Comparison

Ring Sizer vs Caliper

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Ring Sizer

Features
Read full description

Ring Sizer is a simple on-screen tool to find your ring size at home. Place a ring on the screen and resize the guide until it matches the inner edge, or measure your finger with the stencil and side slider. Ring Sizer also includes a real centimetre and inch ruler. Get clear US, UK, and EU sizes, save measurements on your device, and calibrate with a bank card for better accuracy. This app uses the standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Caliper

Features
Read full description

Caliper is a pocket precision toolbox โ€” the measuring tools you reach for around the house, in one clean app. FOUR INSTRUMENTS โ€ข Bubble Level โ€” 1-axis and surface. A real glycerin vial that turns true at 0.0ยฐ. โ€ข Ruler โ€” an on-screen scale in mm, cm, or inches. โ€ข Angle Finder โ€” a protractor and a tilt clinometer, with roof pitch and grade. โ€ข Sound โ€” a quick decibel check of the room. GUIDED JOBS Do not just read a number โ€” get the job done. Hang a Picture, Level a Shelf, Roof Pitch, Level Furniture: each walks you through it and saves the result. A MEASUREMENT LOG Keep every reading and group them into projects โ€” the kitchen shelf, the living-room frames. PRECISION Calibrate the level and ruler with a fine tilt offset, and feel a firm haptic tick the moment a reading is true. HONEST BY DESIGN No ads. No tracking. No accounts. Everything is measured on your device and stays there โ€” Caliper collects no data. The four instruments are free, and the log keeps your most recent 25 readings. Caliper Pro unlocks every guided Job, the unlimited log with projects, and precision calibration. Note: readings depend on your device sensors and are intended for everyday use, not certified measurement. Caliper Pro is an auto-renewing subscription, offered monthly or yearly with a 7-day free trial. Payment is charged to your Apple Account at confirmation of purchase. It renews automatically unless cancelled at least 24 hours before the current period ends; manage or cancel in Settings > Apple Account > Subscriptions. Terms of Use: https://theknack2020-sketch.github.io/caliper/terms-of-use.html Privacy Policy: https://theknack2020-sketch.github.io/caliper/privacy-policy.html

Screenshots

Ring Sizer4 screens
Caliper4 screens

Verdict

The call

The clearest difference is iOS requirement: Ring Sizer at 15.1 against Caliper's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Ring Sizer ships an update every 2 weeks, Caliper every 6 days. The most recent releases landed on October 25, 2026 and November 2, 2026 respectively.

Scorecard1 real difference ยท 5 level
Ring Sizer versus Caliper: the parameters behind the verdict, then further details
ParameterRing SizerCaliper
PriceFreeFree
Update frequencyEvery 2 weeksEvery 6 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPod โ€” betteriPhone
Requires iOS15.1 โ€” better17.0
Further details โ€” not scored
Size49 MB2 MB
Age rating4+4+
DeveloperYaroslav TrofimovUFUK OZDEMIR

In-app purchases

None

Ring Sizer

No in-app purchases

None

Caliper

No in-app purchases

Questions

Is Ring Sizer free?
Ring Sizer is free to download, with no in-app purchases.
Is Caliper free?
Caliper is free to download, with no in-app purchases.
Do Ring Sizer or Caliper have ads?
Neither Ring Sizer nor Caliper shows ads.
Which is updated more often, Ring Sizer or Caliper?
Ring Sizer ships an update every 2 weeks, and Caliper every 6 days. Most recently, Ring Sizer was updated on October 25, 2026 and Caliper on November 2, 2026.

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