A calendar and to-do list in one app, updated for the Duo
Does ToDoCal work on iPhone Duo?
According to its developer, yes. FoldHunt's editor hasn't checked ToDoCal on iPhone Duo yet, so it's listed as a claim.
- Developer claimedThe developer, in the release notes for version 0.4.0 (released October 10, 2026), which list support for the foldable iPhone Duo. There are no pictures of it on the Duo yet. The App Store seller is Unlypt (id 6759196723).
Adapted for the fold
We're waiting on details of exactly what ToDoCal changes for the fold. Are you the developer? Tell us.
About ToDoCal
ToDoCal keeps calendar events and tasks in one place, with widgets and AI that turns events into tasks. Version 0.4.0 adds support for the foldable iPhone Duo, the release notes say, along with clearer 3-day and week views. There are no pictures of it on the Duo yet.
Related guides
The best iPhone Duo apps so far (October 2026)
The apps worth installing now that iPhone Duo is on sale, from the apps Apple named as launch partners to indie apps whose developers have shown a real iPhone Duo layout, picked for what they do when you open the phone.
Do your apps work on iPhone Duo? What happens before they're updated
Every iPhone app opens on iPhone Duo, but only updated ones fill the inner display. What an app looks like before its developer adapts it, how to tell which are ready, and which popular apps have said so.
Is this your app?
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