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CaliperiPhone app

Passport and visa photos — right the first time

Caliper takes and checks document photos against official agency requirements: head size down to the millimeter, background, pose and sharpness. Everything is computed right on the phone — no uploads, no account, no cloud.

We measure, we don't retouch

Download on theApp StoreHow it works
  • On-device checks
  • No account
  • 16 interface languages

Five steps from choosing a country to ready files

No need to dig through agency websites or visit a photo studio: the app guides you step by step and tells you what to fix.

Country and documentRequirements in plain languageGetting ready to shootGuided captureCheck and files

What Caliper checks

Each item gets one of three statuses: passed, failed or "check yourself" when it can't be determined reliably. For every issue, you see exactly what to reshoot.

Head size

Chin-to-crown height in millimeters, within the selected country's tolerance.

Background

Uniformity, the person's shadow on the wall, room corners and door frames in the shot.

Pose and tilt

Head position and rotation angle: the face must look straight into the camera.

Sharpness and exposure

Blur, overexposure and underexposure that get photos rejected.

We measure, we don't retouch

Why no retouching

As of January 1, 2026, the U.S. Department of State explicitly prohibits digital enhancement and AI alteration of passport photos. Apps that quietly "enhance" a photo produce images that get applications rejected. Caliper doesn't change anything in the image — it only measures and advises.

  • No skin smoothing or retouching
  • No background replacement or fill-in
  • No lighting filters

Five destinations

Passport or visa — each country's requirements are kept in a separate profile with a link to the official source.

United States2 × 2 in (51 × 51 mm)
Schengen area35 × 45 mm
United Kingdom35 × 45 mm
Canada50 × 70 mm
India51 × 51 mm

Ready files

JPEG for online submission

An image at the exact pixel size required — ready to upload to the agency's website.

10 × 15 cm print sheet

A 300 dpi PDF with six photos and cut lines. Prints like a regular photo at any photo kiosk.

Your face never leaves your phone

Checks run on the device and stay there. The app's only network request downloads up-to-date country requirements.

  • No uploads, no cloud
  • No account or sign-up
  • Check history stays on your phone
  • Anonymized analytics you can turn off

FAQ

Does Caliper guarantee my photo will be accepted?
The decision is up to the agency. Caliper checks the photo against published requirements and honestly shows which items passed, which failed and which you should check yourself.
Can I check a photo I already have?
Yes. Besides shooting in the app, you can import an existing photo from your library and get the same point-by-point check.
How much does it cost?
Checks are available in the app, and the ready files unlock with a one-time purchase — no subscription.
Where are my photos sent?
Nowhere. Processing happens on the device, no account is needed, and check history is stored only on your phone.
Where can I get Caliper?
Caliper is now available on the App Store — the app is free to download on iPhone and iPad running iOS 17 or later. The button on this page takes you straight to the store.

Now available on the App Store

Caliper for iPhone and iPad on iOS 17 and later. The interface is available in 16 languages, and country requirements update without an app update.

Download on theApp Store