Comparison

Caliper&Ruler vs Rusty.

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

Head to head
About

Caliper&Ruler

Transform your device into a precise digital caliper for measuring objects in inches and millimeters. Features intuitive drag-and-measure functionality and accurate screen calibration using common items.

Highlights
  • Dual measurement units (inches/millimeters)
  • Intuitive drag-and-measure interface
  • Accurate screen calibration
  • Custom calibration options
  • Universal device compatibility
Features
Read full description

Unlock Precision – Your Essential On-Screen Measurement Tool! Turn your iPhone or iPad into a versatile digital caliper. Measure objects accurately in inches and millimeters with an intuitive and easy-to-use interface. Whether you're a DIY enthusiast, student, designer, or professional, Caliper provides precise measurements wherever you need them. Key Features: - Dual Measurement Units: Easily measure in both inches and millimeters. - Intuitive Drag-and-Measure: Simply drag the slider to measure objects instantly. - Accurate Calibration: Calibrate your screen using everyday objects such as credit cards, AA batteries, rulers, or CDs/DVDs/Blu-ray discs. - Custom Calibration: Use any object with a known length for precise adjustment. - Universal Compatibility: Designed for iPhone (landscape only) and iPad (all orientations). Download Caliper and experience accurate measurements anytime, anywhere.

About

Rusty.

Features
Read full description

Keep your vehicle history organized and your costs under control Rusty helps you track every repair, service, and modification across all your vehicles. You always know what’s been done, when, and how much it cost. Whether you’re maintaining a daily driver or building a project car, Rusty gives you a clear, complete view of your ownership experience. SERVICE HISTORY Log every job with date, mileage, parts, labor, and notes. Instantly see your full maintenance history, sorted and organized. COST TRACKING Track parts, quantities, and labor costs. Rusty automatically calculates totals per service and across the lifetime of your vehicle. INSIGHTS & TRENDS Understand your spending over time. See your most expensive parts and how maintenance costs evolve year over year. PDF REPORTS Export professional service reports in one tap—perfect for selling, insurance, or personal records. MULTIPLE VEHICLES Manage cars, motorcycles, and builds separately, each with its own history and cost overview. Built for car enthusiasts, weekend mechanics, and anyone who wants full control over their vehicle history.

Screenshots

Caliper&Ruler4 screens
Rusty.4 screens

Verdict

The call

The clearest difference is iOS requirement: Caliper&Ruler at 18.4 against Rusty.'s 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Caliper&Ruler sells 1 one-off in-app purchase and Rusty. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 8 level
Caliper&Ruler versus Rusty.: the parameters behind the verdict, then further details
ParameterCaliper&RulerRusty.
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 6 weeksEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.4 — better26.0
Further details — not scored
Size5 MB1 MB
Age rating+44+
DeveloperJun YamabeDario Gartmann

In-app purchases

1 purchases

Caliper&Ruler

One-time1
  • Remove Ads$2.99
1 purchases

Rusty.

One-time1
  • Rusty. Premium$2.99

Questions

Is Caliper&Ruler free?
Caliper&Ruler is free to download, with in-app purchases available.
Is Rusty. free?
Rusty. is free to download, with in-app purchases available.
Do Caliper&Ruler or Rusty. have ads?
Neither Caliper&Ruler nor Rusty. shows ads.
Which is updated more often, Caliper&Ruler or Rusty.?
Caliper&Ruler ships an update every 6 weeks, and Rusty. every 6 weeks. Most recently, Caliper&Ruler was updated on October 30, 2026 and Rusty. on October 25, 2026.

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