Focal Length Field of View

Calculate the exact horizontal, vertical, and diagonal field of view for any lens focal length and sensor size to plan compositions.

Design iOS Paid subscription

Available on theApp Store soonRequest TestFlight invite

Who it's for

How the subscription works

Free version with ads: the core tool stays usable for everyone. Premium (weekly, monthly or yearly subscription, or a one-time Lifetime purchase) removes all ads and unlocks field of view calculation, lens focal length input, sensor size compatibility.

Auto-renews monthly via Apple's standard subscription system.
Cancel anytime in Settings → Apple ID → Subscriptions.
Refunds are handled by the store that took the payment, under its own policy: Apple at reportaproblem.apple.com, Google Play and the Microsoft Store through your account with them.
No third-party tracking or analytics SDKs inside the app.

What we don't collect

Your contact list, photos, location, microphone, or camera.
Any content you enter into the app (notes, logs, data) — it stays on your device unless you explicitly sync.
Identifiers used to track you across other apps.

Full details in our privacy policy.

Not on sale yet

This app is still in private testing. To be told when it goes on sale, email [email protected] with the subject line Focal Length Field of View.