Arc Timeline 4 (1.2.1) release notes

Version 1.2.1, 2026-05-12 (Bali)

• New Storage view in Settings — see how much space Arc Timeline 4 is using on device and in iCloud Drive, broken down by category (BIG-313)
• Cleaned up the system temp directory — iOS hasn’t been reliably purging these on its end, so they were accumulating significant disk space. Affected users may recover meaningful free space on first launch
• Swedish locale now uses km for long distances instead of “mil” (Scandinavian mile) (BIG-472)
• Fixed the share button on the daily timeline staying visible when navigating into timeline sub-views

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I love the new storage view! It looks neat. I almost wish to have another episode where Arc uses a lot of space and see what this view reports. Ha!

That said, maybe you can add some text to the UI to explain which part will be included in the iCloud backup (not iCloud Drive)?

My iCloud backup shows that Arc Timeline 4 uses 10+ GB:

This just seems implausible:

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On this one I don’t actually know the answer! Well, I can say with confidence that it doesn’t include the stuff that’s in the app’s iCloud Drive folder. It would be silly for Apple to include that in the app backups. And I believe iOS’s backups also don’t include the apps themselves, because that’d be just a duplicate of what Apple already have for all apps in the App Store. No point in putting that in there.

So in principle the iOS iCloud backup should include only the app’s container - the same thing our new Storage view is enumerating.

Yeah this discrepancy is curious. I can’t think of any reason for that, well other than the possibility that that iOS backup ran before you got the 1.2.1 update, which cleared out the temp files on launch. So the numbers you’re seeing in the new Storage view are current state and size, while the iOS backup is previous state and size.

If that’s the case then the next iOS backup (presumably about a day later) should shrink down considerably. Worth checking it again tomorrow to see what it looks like then.

I think iOS is lying again. I added up the sizes by the various apps and they don’t even match the total. In the screenshot my photos are 6.56GB, the two Arc apps are 10.24GB and 6.76GB; just these three added exceeds the total backup size of 20.38GB. So either I’m misunderstanding this UI or iOS is just bad at calculating space.

Heh. This feels painfully familiar. For years I’ve been dealing with iOS’s Battery view not adding up, or actively misleading due to unintuitive calculation decisions. And then the whole storage space thing where iOS was counting the temp dir stuff, even though that’s a system folder, explicitly purgeable.

Hopefully it’ll self correct after a few days. Though I’ll be curious to see! There’s still some unknowns here. Hard to be certain about it.