Folded
The outer screen: layout, tap targets, and text that clips or overflows.
Testing on a real iPhone Duo since launch day
See your app on the iPhone Duo before your users do.
I'm a UK tech enthusiast with a real iPhone Duo. I test your app folded, unfolded and mid-fold, then send you a clear report with screenshots, clips and the fixes that matter most.
- Physical device, not a simulator
- Fixed price, agreed upfront
- Max 3 reviews a week
Illustration only, not a real app.
Why now
3,494 of 4,904
apps listed on the Fits Duo tracker were marked letterboxed on the iPhone Duo's inner screen.
Source: Fits Duo, 27 Oct 2026April 2027
Apple says apps and games submitted to the App Store will need iPhone Duo screenshots from then on.
Source: Apple Developer News, 5 Oct 2026Badge
Apps that submit iPhone Duo screenshots get an "optimized for iPhone Duo" badge on their App Store page.
Source: Apple Developer, Prepare for iPhone DuoHow it works
Three steps, no fuss
- 1
Tell me about your app
Send the App Store link or a TestFlight invite, plus the flows you care about most. I'll reply with a fixed quote and a turnaround date.
- 2
I test it on the Duo
Every pose on a physical iPhone Duo: folded, unfolded, half-folded, folding mid-task, rotation, larger text and dark mode.
- 3
You get a clear report
A one-page report with screenshots, short clips, a severity for each issue and a recommended fix order your developer can pick up straight away.
What a readiness review covers
Every pose, every key flow
Anything that looks or behaves wrong gets a screenshot, a severity rating and a suggested fix.
Unfolded & letterboxing
Does the app use the big inner screen, or sit in a small window with black bars?
Half-folded & hinge
Buttons, video and text that land awkwardly across the fold.
Folding mid-task
Fold or unfold while scrolling, typing, playing media or signing in. Is anything lost?
Rotation & multitasking
Portrait, landscape and side by side with other apps where supported.
Accessibility & dark mode
Larger text sizes, VoiceOver basics and dark mode on both screens.
What you get
A report you can act on today
One page, written for product owners and developers alike.
- An overall rating: Ready, Mostly ready, Needs work or Not ready
- Your top 3 issues, plus what already works well
- Findings rated by severity (Critical to Low) and effort (S, M, L)
- Screenshots and short clips from the real device
- A recommended fix order, linked to Apple's design guidance
Example
Duo Readiness Review: Example App
Version 4.2 · iOS [version] · Tested on iPhone Duo
| ID | State | Issue | Severity |
|---|---|---|---|
| D1 | Unfolded | Opens letterboxed with black bars | High |
| D2 | Mid-fold | Checkout form clears when unfolding | Critical |
| D3 | Half-folded | Play button sits on the hinge | Medium |
| D4 | Folded | Tab labels truncate at large text | Low |
Fig. 1Fig. 2Fig. 3Fig. 4
Duo app checks
Free public checks, filmed on the device
Short walkthroughs of how apps behave on the iPhone Duo. The first ones are being filmed now.
Video coming soon
Coming soon
App check #1
Folded, unfolded and mid-fold walkthrough.
Video coming soon
Coming soon
App check #2
Folded, unfolded and mid-fold walkthrough.
Video coming soon
Coming soon
App check #3
Folded, unfolded and mid-fold walkthrough.
Want your app checked? Suggest it here.
Launch pricing
Simple, fixed prices
The price is agreed before I start. No retainers, no surprises.
Limited weekly slots. I take on a maximum of 3 reviews a week, so every app gets proper time on the device.
Founding reviews
Free
For the first 3 apps only
- The full readiness review
- In return: honest feedback on the report
- And permission to publish the results
Launch price
Small apps
from £149
A handful of key screens and flows
- Every Duo pose tested on a real device
- One-page report with screenshots and clips
- Prioritised list of recommended fixes
Standard
£249–£399
Larger apps with more flows
- Everything in the small-app review
- More screens, flows and edge cases
- Turnaround agreed upfront
Help with the fixes is optional and quoted separately once you've seen the report.
FAQ
Questions, answered
Who are you?
I'm a UK-based tech enthusiast who bought an iPhone Duo on launch day. I'm not a big agency. I test apps carefully on the real device and write up what I find in plain English.
Why not just use the simulator?
The simulator is a great start, but some things only show up on real hardware: how content sits near the hinge, what happens when you physically fold the phone mid-task, and how it feels in the hand.
What do you need from me?
The app on the App Store or a TestFlight invite, a test login if needed, and the main flows you care about most.
Why only 3 reviews a week?
So each app gets proper time on the device. If this week's slots are taken, I'll give you the next available date.
What's a founding review?
The first 3 apps get a full review free. In return I ask for honest feedback and permission to publish the results as a public app check.
Will you fix the issues too?
If you'd like help, I can quote for it once you've seen the report. It's optional, and the report is yours to use however you like.
What isn't covered?
Reviews cover layout and behaviour on the iPhone Duo. They don't cover security, performance testing or App Store approval.
Get your app checked on a real iPhone Duo
Send me your app's name and I'll reply with what I'd test, a fixed price and the next free slot.
hello@foldtested.co.uk