Well, this is no small update like I had planned after the previous update. This is by far the largest update to Arctic so far. I've packed well over a hundred fixes, improvements, and new features into this release. I'm happy I finally had the time to work on some larger features and bug fixes that I have been putting off for a long time.
Arctic Theme Support (beta)
I've talked about this for a long time and finally had the chance to implement support for themes in Arctic. This took a lot of work, but it has definitely paid off. I've included 12 default themes to choose from, as well as an editor to design your own custom themes. Rather than attempting to make every color themeable individually, I tried my best to minimize the colors used while still allowing for robust customization. With that said, I am looking for feedback on the theme editor. Themes can be configured for either light or dark mode, so you can mix and match them to your liking, e.g., Sepia during the day and Dracula during the night.
Themes can be imported and exported using a simple JSON file (ATDF “Arctic Theme Definition File"). You can duplicate any theme and edit to your liking, and switch between them with a single tap. I am planning a service for sharing and browsing community themes in the future, but first I would like to get some feedback on theming to finalize the format.
Markdown Improvements
I came across this post about Markdown support in Lemmy apps recently. It highlights many issues with Markdown rendering in a lot of the Lemmy clients that are available. Arctic seems to have scored fairly well with a 9.3/10.
Some of the issues that were highlighted about Arctic were:
Images not properly rendering in-line.
Headers not working inside spoilers
Tables not aligning columns correctly
Well, this motivated me to work on improving markdown support in Arctic. I took some time and fleshed out support for embedded content in Markdown. Images, Videos, Tables, Spoilers are all embedded now which has allowed for many improvements to the rendering system, and more advanced control over the appearance. I've also fixed several issues where markdown rendering did not obey the Common Mark specification.
Media Uploads
Arctic no longer requires permission for selecting media from the photo library. I've also enabled support for uploading videos, and improved error handling to better convey issues with uploading media. Arctic also has support for uploading directly to Catbox.moe, this can be useful if you have a video that is too large for Lemmy or just prefer not to host media on Lemmy. Optionally, you can log in to Catbox so files are uploaded directly to your account and can be deleted later (anonymous uploads can only be deleted by Catbox.moe's admin). As a side note, I developed Catbox-Swift for easily managing Catbox.moe uploads. Please feel free to use this in your projects.
Media APIs
Arctic finally supports playing videos hosted by Lemmy (Picts). This has been a long-time frustration for me, as videos hosted on Lemmy servers seem to have issues playing on all Apple platforms. Well, I finally had the time to track down the issue preventing playback and attributed it to server configuration and Apple oddly not handling this issue well. In addition to Lemmy video, Arctic can now stream videos on PeerTube and Streamable. I've improved support for streaming YouTube videos, and fixed several issues with Reddit, and Imgur media.
Performance and Energy
I've rewritten large portions of Arctic's backend with performance, reliability, and consistency in mind. On average, Arctic now uses about 75% less memory, and significantly less CPU. In rewriting these systems, I was able to make a lot of improvements to caching behavior to reduce network usage, and increase consistency in rendering content. When Arctic is idle, or backgrounded, systems will shut down, and memory will be freed to prevent any energy consumption while the app is not in active use.
v0.4.2.3 Changelog
Arctic Theme Support (Beta)
Theme support is in beta. Please submit any feedback related to improvements or issues
Added support for custom themes
Separate themes for light and dark mode
Automatic theme switching
Full theme editor, with live previews
Instant switching of themes (some issues with this)
Import and export themes
Copy themes to customize to your liking
12 default themes to choose from:
Arctic Light
Arctic Dark
Arctic Black
GitHub Light
GitHub Dark
Dracula
Alucard
Crème
Solarized
Nebula
Verdandi Light
Verdandi Dark
Markdown
Added support for embedded videos
Added support for embedded images in Markdown tables
Added support for markdown image links
Added rounded corners to embedded media
Added optimizations for caching embedded content layout
Added support for additional Lemmy link formats /c/<community>@<instance> and /u/<user>@<instance>
Added invisible break shortcut to the markdown toolbar for inserting invisible thematic breaks using HTML comment <!-- -->
Updated block quote appearance to render full length margin lines for nested quotes
Updated markdown parsing with improvements to parsing speed
Updated spoiler parsing to improve reliability
Updated link detection and handling
Updated defaults to enable embedded content by default
Fixed HTML rendering using incorrect font and text colors
Fixed an issue where spoilers would be parsed inside code blocks
Fixed an issue where a Markdown table occurring immediately after a spoiler could break rendering of the spoiler
Fixed an issue where inline code may be incorrectly parsed
Fixed soft breaks in code blocks having incorrect indentation
Fixed an issue where links were not tappable when contained in an embedded Markdown table
Fixed some issues with inline images being positioned incorrectly
Link Previews
Added support for audio in link previews: e.g. for playing audio previews on Spotify links
Added a new network manager for improved control over network requests
Added support for fetching the apple-touch-icon from links instead of relying on Google for favicons
Rewrote open graph parser to improve reliability and performance
Fixed an issue where direct download links could result in Arctic loading large files into memory while attempting to provide a link preview
Fixed an issue where link previews could be unnecessarily be reloaded when they are already cached
Media Uploads
Uploads no longer require permission for selecting media from the photo library
Added support for selecting and uploading videos
Added support for uploading media directly to Catbox.moe
Added option to select the default upload destination (Lemmy, Catbox, ask each time)
Added option to log into Catbox.moe, so uploads will be added to your account
Improved logging of errors when uploading media
Media APIs
Added support for playing videos hosted on Lemmy. (Videos hosted by Picts have issues playing on Apple platforms due to server configuration, arctic will now detect this and preload the video for playback)
Added support for PeerTube videos
Added support for Streamable videos
Improved support for YouTube videos
Improved caching behavior to reduce network usage
Improvements
Major overhaul to memory and energy management in Arctic. On average, Arctic now uses 75% less memory, and significantly less CPU and energy. There are some cases where memory and CPU usage may spike, such as views with a high number of animated images. However, Arctic will attempt to listen to system warnings and unload resource intensive tasks when requested.
New Features
Added support for additional image formats such as AVIF, and SVG (shields.io)
Added an experimental feature to dim media when dark mode is enabled
Added support for fetching media from Reddit post and comment links
Added a new paging image gallery view, you can choose between paged, or grid appearance in settings
Added a new option related to the Post Image Size option to allow scaling images down to fit the full image in the view
Added a warning alert when attempting to submit a comment with no content
Added support for Haptic Touch on images and videos to allow saving/sharing media
Added an overlay for media that failed to load to allow attempting to reload the media
Added support for domain filters, You can now filter individual websites from post feeds
Added caching of media playback positions, media will now resume at its previous position
Added a close button to the changelog popup when launching Arctic
Changes
Updated font sizes throughout the app for better consistency.
Updated the new comments indicator to subtly add a green (+) icon in the center of the comments icon
Updated the indicator used for featured posts
Updated avatar image labels to improve performance
Updated rendering of inline code that wraps lines
Updated the Community Selector appearance
Updated link handling to attempt loading all links over HTTPS, Arctic does not allow unsecured network requests
Updated crosspost detection to be more lenient. Some clients have slightly different formatting for crossposts, and Arctic will now detect more of these formats
Updated open post views to more closely resemble post feed appearance
Updated image processing to improve performance and reliability in detecting image formats
Updated the video player with modern swift observers removing some legacy code
Updated the profile header appearance
Updated the progress bar on inline videos
Updated the playback controls in the media viewer with an iOS 18 esque appearance
Updated the preloading behavior in post feeds, this addresses several issues with inconsistent layout, content disappearing, content failing to load, high memory usage, etc. This has drastically improved performance and reliability within post feeds
Updated video thumbnail loading to improve reliability and performance
Updated image gallery layout and improved performance
Updated the project removing some unused legacy code
Updated changelog popup not to show on the first time launching Arctic
Fixes
Fixed issue where Arctic would request permission to send notifications on its first launch. Permissions will only be requested when enabling notifications in settings, or adding a Community Notification for the first time.
Fixed issue where widget insets would be too large on iOS 17+
Fixed issue where Reddit gallery links would not properly load content
Fixed issue where some links could incorrectly be treated as YouTube links
Fixed issue with some cells appearing clipped when using a notched device in landscape
Fixed an issue where changes to the unique notification token for devices would not be synchronized with the notification server
Fixed issue where media would not pause when dismissing an open post view
Fixed Bar Shadows setting not applying when blurred or default bar styles are enabled
Fixed several layout issues that could cause performance drops, and incorrect rendering in some cases
Fixed an issue where importing user settings would show a success alert even if the import was canceled
Fixed an issue where Arctic may crash when refreshing a profile view
Fixed an issue where media in comment cells could continue to play even when it is out of view
Fixed an issue where the mod reason composer would show full-screen rather than as a popover
Fixed an issue where image gallery's' could cause a crash due to invalid links
Fixed an issue where some pages would allow pull to refresh even though it was unused
Fixed an issue where widgets would display very low quality images
Fixed an issue in private messages where the bottom inset would be incorrect after sending a message
Fixed an issue where clearing the search query in the Community Selector could continue to show results for the first letter of the cleared query
Fixed an issue where the navigation bar might not reappear when swiping back from search results
Fixed an issue where the cancel button would appear on the right-hand side when inserting a link or image using the markdown toolbar
Fixed an issue where refreshing a profile, or scrolling would repeat some API requests when they already cached
Fixed an issue where multiple API requests to the same endpoint could occur at the same time, duplicate requests will now be batched into one to prevent unnecessary network traffic, and reduce server load
Fixed an issue where embedded crossposts could incorrectly show an empty image gallery view
Fixed an issue where avatar images would be fetched even if they are disabled in settings
Fixed an issue allowing images to be re-downloaded even if they were already cached
Fixed an issue where Imgur gifv links would not load, these links are now redirected to the direct media link
Fixed an issue where the random community button in the search tab could cause a crash, or load the home feed
Fixed an issue where opening a community you are not subscribed to while the listing type is set to Subscribed, would result in an empty feed
Fixed an issue where Arctic could crash when scrolling in post feeds, or after reopening Arctic from the background
Fixed an issue where video seeking could be inaccurate
Fixed a typo in appearance settings
Fixed an issue where saving HLS videos would silently fail. Saving HLS streams is unsupported, and an alert will be shown when attempting to save HLS content
iOS 18
Fixed a visual glitch when hiding the tab bar on iOS 18 due to an iOS bug
Restored tab bar appearance on iOS 18 to use the classic style
MacOS
Added support dismissing media previews using the trackpad
Added support for building as Optimized For Mac (So much left to fix with this)
Added better support for App Nap on Mac by pausing non-essential background activity
Added keyboard shortcut (Command + Return) for submitting comments, posts, messages, etc.
Fixed an issue where the login controller would be shown off screen when presented from the account quick switcher
Haha, yeah. What it really came down to was scrolling through the comments in that post. I noticed a lot of issues with Markdown rendering for some edge cases. For a Markdown based platform, at the very least the clients should properly support Markdown rendering.
Arctic does support selecting text in posts and comments. You can access this feature using (•••) -> Select Text. I’m not sure how Voyager handles text selection, but in Arctic this will show a popup with the raw Markdown for copying.
On the profile header, could we get an option to have the more expanded appearance? I like seeing the banner art when people add that to their profile, but the new gradient overlay and position of the avatar and username obscure a lot of it now.
I tried to leave a tip, but the testflight version indicates the transaction would not be real. Is there a way to do that and still use testflight?
I had the same thought about the profile header. It looks better than before, but it does obstruct the image. I have a few ideas I want to try in order to continue using the same effect without obstructing the banner image. I’ll definitely figure something out for this, even if it means removing the effect and lowering the avatar section.
Unfortunately, Apple does not allow real purchases inside TestFlight apps. You are however able to switch between the AppStore version and TestFlight version without loosing any settings. Alternatively, I also have a link to Buy Me A Coffee in the Arctic community sidebar.
Wow, thank you for all of the hard work. The themes had me so excited (especially Cremé) but then I saw a… theme maker option?? I literally spent an hour fiddling with a theme and found a combination that I like.
Here are the theme files, if anyone wants to try them. Also it’s the first time sharing files via Proton Drive, so let me know if it works:
My pleasure! Theme support is something I have wanted to add for a very long time, but I never had the time to work on it, as I knew it would be a lot of work. I’m glad you like it. I could be mistaken, but I believe you may be the first person I had spoken to about theme support nearly a year ago, well its finally here now.
I am planning to make some improvements to the theme editor. I want to add descriptions for each color to specify what it changes. I also need to go through and prevent setting transparency for some colors, and I need to add more preview views so you can see how the theme will look in different contexts.
While I was making the default themes, I used vscodethemes.com as a reference for most of them. I just used a color picker and dragged the hex color into Arctic (you can drag and drop any of the colors, including dragging colors from other apps). For testing, you can set the theme you are editing as the active theme, and then whenever you press Save, the theme will be applied throughout the app. This way you can make changes, and then quickly test them in different views.
The themes look great, and the links work well. I didn’t test this until now, but I was able to download and install the themes without leaving the app. So that is great. By the way, if you long press a theme in the theme browser, it allows you to share the generated preview image like the ones I included in the post. I thought this may be useful for anyone sharing a theme to be able to include a preview.
That might have been me, I always ask for more visual options haha. The colors really make it more pleasant to use. Anecdotally, the performance seems better with transparencies off, using opaque colors. 
Thanks for the tip for testing the colors. And sharing the preview. I’ll try editing my post to have the previews included.
Also on a personal note, make sure you pace yourself and take breaks. There will always be more to improve and sometimes I think people feel that they need to push themselves. It can wait. Two of my favorite Lemmy apps kind of just stopped flat, and my hunch is that the developers got burnt out.
In Voyager I can long press on them from the post. I don’t see the instances in the Arctic posts and my instance blocks aren’t showing up in filters/account blocks for my account.
Thank you for bringing this up, It’s something I keep forgetting to address. Instance blocking in Arctic was added before Lemmy added support for instance blocking. Currently, Arctic does instance blocking locally, rather than using the API. I’ll add support for this in the next update.
Fucking legend.
Is there an other option to buy you a coffee beside the in app purchases? Because I am using the TestFlight version, in app purchases are turned off.
Unfortunately, Apple does not offer a way to enable in app purchases in TestFlight. You are able to switch between the AppStore version and TestFlight version without losing any settings. Alternatively, I do have a Buy Me A Coffee set up if you’d rather use that. I have a link for this in the community sidebar, but I am unable to include alternative payments inside the app itself.
Holy smokes! This has been an excellent update. Image & GIF handling is much improved, and overall speed of the app is smoother “feeling” as well. I wanted to get into using themes, but the text colors for the darker themes are too similar to the background they’re on making legibility more difficult. Not a negative for some folks, but not ideal for me.
As for theme contrast and legibility, the default Dark and Black themes should have plenty of contrast, as they are the default dark mode colors for iOS. The rest of the themes are based off of existing code editor themes, which I may need to tweak a little. In the mean time, you can long-press any default theme and duplicate it, from there you can edit any color you want to change, or you can design your own theme from scratch if you’d like.
This is the first beta release of theming support, there is still a lot that I plan to add and update. I’ll need to spend some more time refining the default themes, as most of them were quickly made while testing the theme editor.
This is coming. I took week off after this last update just because I needed it. I’ve been working on a small updated, mostly just patching some minor issues in the last release. I planned to release this to TestFlight last weekend, and the AppStore this week, however I’ve been fighting a cold all week and it set me back.
I should hopefully release the update this weekend, and I may just submit it to the AppStore as well since there are no braking changes in this release.
I know the AppStore version is way behind, I need to start updating that after each TestFlight release.
Thanks for letting me know, it’s fixed now. There was a formatting issue with that link. By the way, you can also access the GitHub link from the bottom of the settings page.