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.
Are LUTs baked into my recording?
No. LUTs are preview-only in RatioRoll. They help you monitor a look while shooting, but the saved recording remains ungraded for post-production flexibility.
Pricing
How much does RatioRoll cost?
The current App Store release is free to download and use. There is no account, subscription, in-app purchase gate, or recording quota in the current release.
Do I need an account or subscription?
No. RatioRoll does not have accounts, logins, subscriptions, or an active in-app purchase gate in the current App Store release.
Why did older pages mention a free trial or Pro?
Older pre-release copy referred to a planned paid gate. The current App Store release is free to download and use, with no account, subscription, in-app purchase gate, or recording quota.
Privacy
Does RatioRoll upload my videos anywhere?
No. Your videos and audio stay on your device. RatioRoll may send privacy-minimal first-party diagnostics for launch, camera, recording, crash, or hang issues. Diagnostics do not include videos, audio, photos, location, contacts, Apple ID, payment details, or advertising identifiers. Full details are in the privacy policy.
How do I delete my data?
Your recordings are in your iPhone's Photos library. To remove local app data, delete the app from your iPhone. Recordings already saved to Photos remain in Photos until you delete them there. You can email darius@h3lloh3llo.co.uk to ask about deleting diagnostic reports associated with information you can provide.
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.