Comparison

RulePad vs Caliper

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

Head to head
About

RulePad

Features
Read full description

RulePad is your all-in-one measurement toolkit. Screen rulers, AR measurement, protractor, and photo measurement — everything you need in one app. RULER • Multiple rulers on a free-form canvas • L-ruler for measuring corners • Metallic silver design with precise tick marks • Full-screen ruler mode with edges on all four sides • Pinch-to-resize protractor for angle measurement • Custom calibration for any device AR MEASURE • Tap to measure distances in the real world • Flexible tape mode — follow curves and edges • Close loop for floor plans with area calculation • Drag to adjust placed points • Screenshot measurements with annotations • Triangle and polygon angle display PHOTO MEASURE • Measure objects in photos • Calibrate with preset reference objects (coins, cards, paper) • Pinch to zoom for precision placement • Track sizes over time HISTORY • All measurements saved automatically • Export to 2D technical drawings Privacy Policy: https://quietbyte.io/privacy-rulepad.html

About

Caliper

Features
Read full description

Caliper is a pocket precision toolbox — the measuring tools you reach for around the house, in one clean app. FOUR INSTRUMENTS • Bubble Level — 1-axis and surface. A real glycerin vial that turns true at 0.0°. • Ruler — an on-screen scale in mm, cm, or inches. • Angle Finder — a protractor and a tilt clinometer, with roof pitch and grade. • Sound — a quick decibel check of the room. GUIDED JOBS Do not just read a number — 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 — 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 — 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

RulePad4 screens
Caliper4 screens

Verdict

The call

The clearest difference is update cadence: Caliper at every 6 days against RulePad's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

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

UpkeepUpdate frequency

RulePad ships an update every 2 weeks, Caliper every 6 days. Both last shipped on October 13, 2026.

Scorecard1 real difference Ā· 5 level
RulePad versus Caliper: the parameters behind the verdict, then further details
ParameterRulePadCaliper
PriceFreeFree
Update frequencyEvery 2 weeksEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size3 MB2 MB
Age rating4+4+
DeveloperJUMING LAIUFUK OZDEMIR

In-app purchases

None

RulePad

No in-app purchases

None

Caliper

No in-app purchases

Questions

Is RulePad free?
RulePad is free to download, with no in-app purchases.
Is Caliper free?
Caliper is free to download, with no in-app purchases.
Do RulePad or Caliper have ads?
Neither RulePad nor Caliper shows ads.
Which is updated more often, RulePad or Caliper?
RulePad ships an update every 2 weeks, and Caliper every 6 days. Most recently, RulePad was updated on October 13, 2026 and Caliper on October 13, 2026.

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