Comparison

OneKit 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

OneKit

Features
Read full description

OneKit Smart Toolbox is a smart measurement app transforms your phone into universal digital instrument. If you want to take quick measurements at your house, during work or when you are out this app has necessary tools in one friendly interface. No need for additional gadgets, just launch the app and start measuring right away. The ruler feature helps you to measure length and distance by directly pointing at the screen with very high accuracy. Great for quick verifications, school assignments or home improvement the ruler comes with both metric and imperial units. With the protractor tool angle measurements are swift and easy. All you have to do is position your gadget and it will give you accurate angle measurements within a few seconds. This instrument can be used by students, engineers, architects and anyone else who needs to measure angles or do construction work using an device. Noise meter keeps you updated with real sound level. It hardly matters if you're measuring the noise of the environment, sound exposure at the workplace or just taking a glance around this tool will give you decibel levels and turn your device into a convenient sound measuring gadget. The integrated metronome is a great help musicians and performers as it is tightly tuned to controlling tempos precisely. Input your BPM, select your rhythm and maintain the exact timing for your rehearsals. Speedometer feature can track your running speed in realtime with GPS technology. It's perfect for cycling, running or driving and it shows your speed clearly and accurately. The level tool can be used to check the alignment of the surfaces or the objects in the horizontal as well as vertical directions with great accuracy. Whenever you use it to hang pictures or even making different types of home improvements the digital level will keep everything in perfect balance. Terms and Privacy: Privacy Policy: https://sites.google.com/view/ipprivacy-policy/ Terms of Use: https://sites.google.com/view/iterms/

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

OneKit4 screens
Caliper4 screens

Verdict

The call

The clearest difference is in-app purchases: Caliper at none against OneKit's 3. Caliper also leads on update cadence (every 6 days vs every 3 weeks). On price, ads, device support and iOS requirement 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. OneKit sells 3 in-app purchases, starting at $2.99 per 7 days. Caliper asks for nothing beyond the download.

UpkeepUpdate frequency

OneKit ships an update every 3 weeks, Caliper every 6 days. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

Scorecard2 real differences ยท 4 level
OneKit versus Caliper: the parameters behind the verdict, then further details
ParameterOneKitCaliper
PriceFreeFree
Update frequencyEvery 3 weeksEvery 6 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS18.617.0 โ€” better
Further details โ€” not scored
Size5 MB2 MB
Age rating4+4+
DeveloperOlekcii PonomarenkoUFUK OZDEMIR

In-app purchases

3 purchases

OneKit

Subscriptions3
  • Weekly subscription$2.997 Days
  • Monthly subscription$9.991 Month
  • Yearly subscription$49.991 Year
None

Caliper

No in-app purchases

Questions

Is OneKit free?
OneKit is free to download, with in-app purchases available.
Is Caliper free?
Caliper is free to download, with no in-app purchases.
Do OneKit or Caliper have ads?
Neither OneKit nor Caliper shows ads.
Which is updated more often, OneKit or Caliper?
OneKit ships an update every 3 weeks, and Caliper every 6 days. Most recently, OneKit was updated on October 13, 2026 and Caliper on October 25, 2026.

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