Every HomeKit battery in one place, with your devices beside their details when open
Does HomeBatteries for HomeKit work on iPhone Duo?
Yes, the developer says so: since version 4.1, the open Duo puts your devices in a sidebar on the left and the battery details on the right.
- App Store confirmedAdam Foot, the developer, in the App Store release notes for version 4.1, which say the open Duo shows several columns and adjusted toolbars. In an email to FoldHunt, Adam described the open layout: devices in a sidebar on the left, battery details on the right.
Adapted for the fold
- Open · Inner display
Devices beside their batteries
Open, the list of devices sits in a sidebar on the left, and the battery details of the one you pick fill the right.
About HomeBatteries for HomeKit
HomeBatteries is for homes with a lot of battery-powered HomeKit accessories. It tracks their battery levels, warns you when one is running low, and keeps a history of replacements, charges and levels over time.
Version 4.1 adds iPhone Duo support. Closed, it is the usual iPhone app. Open, your devices sit in a sidebar on the left and the battery details of the one you pick on the right.
Evidence reviews
What we checked, when, and what the evidence establishes. Each record preserves the support label at that check.
· App Store page reviewed
App Store confirmed · iphone-duo
The App Store release notes for version 4.1.2 (released October 22, 2026) mention iPhone Duo: "In this update: - Added full support for iPhone Duo providing you with multiple columns when unfolded."
App version: 4.1.2.
Store text only: we haven't seen the app running, and the store page doesn't show how each pose is used.
View reviewed evidence ↗· Developer statement reviewed
Developer claimed · iphone-duo
The open Duo shows several columns, with adjusted toolbars.
App version: 4.1.
The developer's written claim only. No pictures or video of the app on the Duo were checked, and no build was tested.
View reviewed evidence ↗
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?
Add the badge to your site or press kit. It links back to this page, where fans can upvote you.
<a href="https://foldhunt.com/apps/homebatteries/"><img src="https://foldhunt.com/badges/featured-on-foldhunt.svg" alt="Featured on FoldHunt" width="220" height="54"></a>Need to update the listing? Email the editor.
Sources: HomeBatteries for HomeKit on the App Store (apps.apple.com)
More for iPhone Duo
JoyJar
ReAlign Leadership LLC
A shared gratitude jar: open the Duo and the jar faces a joy from it, like a book
Simulator verified: ReAlign Leadership LLC, the developer, in a submission to FoldHunt on October 21, 2026, with a plain screen recording of the app on the iPhone Duo simulator (iOS 27.1) on YouTube and a page about the Duo layouts (joyjar.app). JoyJar is coming soon to the App Store and Google Play.
- Open
- Book
- Closed
- Split View
Penjo: Pencil Journal, Planner
Zafer ARICAN
A handwritten journal: today's page on one side of the fold, today's plans on the other
Simulator verified: Zafer ARICAN, the developer, in a submission to FoldHunt on October 20, 2026, with simulator screenshots and recordings on the Penjo site (penjoapp.com). The release notes for version 3.8 (released October 20, 2026) say Penjo is now optimized for iPhone Duo in every pose: open, the page uses Penjo's iPad layouts; in the book and seated poses it stays clear of the fold; fold it shut and the journal closes.
- Book
- Open
- Closed
- Standing
Megu: SI Closet & Planner
JA Technology Consulting LLC
A digital closet and AI stylist, with the piece you tap beside the grid when open
Simulator verified: Jake Antebi, the founder of Megu, in an email to FoldHunt on October 22, 2026, saying Duo support is live with a layout designed for the unfolded screen, and in a post on the Megu blog on October 19, 2026 saying the Duo layouts arrived in version 1.6. The press kit holds unframed captures of the app on the Duo's cover and open display, at the simulator's screen sizes. The App Store seller is JA Technology Consulting LLC. The release notes for version 1.8 (released October 22, 2026) say: "Improvements for iPhone Duo."
- Closed
- Open
- Book