Recording
How do I record both 16:9 and 9:16 from one take?
Open RatioRoll and choose DUAL from the mode selector. The app uses your iPhone's ultra-wide and main rear cameras simultaneously. After you stop recording, both files appear in your Photos library — a 16:9 horizontal clip and a 9:16 vertical clip from the same moment.
Dual-lens mode requires iPhone 13 Pro or newer. On older devices the app falls back to single-lens recording, where both outputs are derived from the rear main camera.
Which iPhones does RatioRoll support?
- Any iPhone on iOS 17 or later — single-lens recording works.
- iPhone 13 Pro or newer — full dual-lens (16:9 + 9:16 from one take).
- iPhone 15 Pro or newer — Apple Log capture.
What does Apple Log do in RatioRoll?
Apple Log captures a flat tonal range that retains shadow and highlight detail for grading in post. RatioRoll supports it on iPhone 15 Pro and newer. When Apple Log is selected, the LUT preview is disabled by default so you see the flat Log look on screen — but recording stays ungraded for full post-production flexibility.
Why does my 16:9 recording look narrower than my phone's standard camera?
In portrait hold, the iPhone sensor's short axis is your horizontal — so 16:9 has a narrower field of view than 9:16 by design. RatioRoll uses 4:3 open-gate capture under the hood, giving you about 35% wider 16:9 horizontal field of view than apps that capture from a 16:9-source format. For the widest possible 16:9 framing, hold the phone in landscape.
What if recording feels unstable on long takes?
Multi-camera recording is intensive on the iPhone's thermal envelope. RatioRoll automatically degrades to a more conservative profile under thermal pressure and stops recording if the device reaches a critical temperature. For long takes, give the device time to cool between sessions.
LUTs
How do I import a custom LUT?
Tap the LUT picker at the bottom of the camera screen, then tap the Import tile. Pick a .cube file from the Files app. The LUT appears in your library and is available for monitoring.
How do I bake a LUT into the recorded file?
With a LUT selected, enable the Bake toggle before you press record. The LUT is applied destructively to the saved file (you cannot re-grade it in post). For grading flexibility, leave bake off and use Apple Log + LUT monitoring instead.
Pricing & purchase
How much does RatioRoll cost?
Free to download with 2 free trial recordings on each device. After the trial, RatioRoll Pro is a one-time non-consumable in-app purchase that unlocks unlimited recordings on your Apple ID. The exact price is shown on the paywall in your local currency.
How do I restore my Pro purchase on a new device?
Sign into the App Store on the new device with the same Apple ID you used to buy RatioRoll Pro. Open the app, record once or twice to bring up the paywall, and tap Restore Purchases. Apple verifies the receipt and unlocks unlimited recording immediately.
The free trial counter didn't reset when I reinstalled.
The 2-recording free trial is one-time per device. We persist the count in the iOS Keychain, which survives uninstall. This prevents trial-loop abuse and matches the behaviour of other professional camera apps. If you've purchased Pro and the entitlement isn't restoring, please email us.
Privacy
Does RatioRoll upload my videos anywhere?
No. Everything stays on your device. RatioRoll has no analytics, no tracking, and no third-party SDKs. The only network calls the app makes are to Apple's StoreKit servers when you purchase or restore the in-app upgrade. Full details in the privacy policy.
How do I delete my data?
RatioRoll stores nothing on our servers. Your recordings are in your iPhone's Photos library, and a small Keychain entry tracks your free-trial recording count. To remove all app data: delete the app from your iPhone. Recordings already saved to Photos remain in Photos until you delete them there.
About
Who built RatioRoll?
H3llo H3llo Ltd — a small UK team. We build RatioRoll full-time and answer support emails ourselves.
Still stuck?
Email darius@h3lloh3llo.co.uk. We answer every email.