Terms Of Service
Terms Of Service
**Stopdown for iOS — last updated 24 August 2026**
By using Stopdown you accept these terms. They sit alongside Apple's Licensed Application End User License Agreement https://www.apple.com/legal/internet-services/itunes/dev/stdeula/, which governs your licence to the app; where the two disagree, Apple's agreement prevails. How we handle data is described in our Privacy Policy.
## Your licence
Stopdown is licensed, not sold. You may use it on devices you own or control, for your own purposes, personal or professional. You may not resell or redistribute it, or attempt to extract its code or data for another product.
## Stopdown Pro
Stopdown Pro is a single purchase that unlocks the exact-camera database, the manual blur limit, focus stacking, the advanced calculators and saved presets. It is not a subscription: nothing recurs and there is nothing to cancel. The purchase belongs to your Apple Account — on another device, use "Restore purchases" in Settings.
## Payment and refunds
Apple sells Stopdown and Stopdown Pro and sets the price in your region. Refunds are handled by Apple at reportaproblem.apple.com; we can neither grant nor refuse them.
## Results are estimates
Stopdown computes depth of field, hyperfocal distance and focus-stacking plans from optical formulas and a criterion for acceptable sharpness — by default a circle of confusion of the sensor diagonal divided by 1442, which you can change. Real sharpness also depends on your lens, its focus mechanics, diffraction, subject movement and how large you print or display the image — things the app cannot see. Treat every number as a planning estimate, confirm critical framing on the camera, and do not rely on Stopdown where a missed shot cannot be taken again.
## No warranty
Stopdown is provided as is. To the extent the law allows, we make no warranty that it will be free of errors, available without interruption, or fit for a particular purpose. Your statutory consumer rights are not affected.
## Limitation of liability
To the extent the law allows, we are not liable for photographs that do not come out as expected, for lost work, or for other loss arising from using Stopdown or relying on its results. Nothing here excludes liability that cannot be excluded by law.
## Changes
We may add, change or retire features, and we may update these terms. The current version is always at this address, with the date at the top. A purchase you have already made stays unlocked.
## Governing law
The laws of Belarus apply, without affecting the consumer protections of the country where you live.
## Contact
yuri.kolesnikov.developer@gmail.com