Caliper&Ruler vs Rusty.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Dual measurement units (inches/millimeters)
- Intuitive drag-and-measure interface
- Accurate screen calibration
- Custom calibration options
- Universal device compatibility
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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.
Rusty.
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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
Verdict
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
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.
Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.
| Parameter | Caliper&Ruler | Rusty. |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | +4 | 4+ |
| Developer | Jun Yamabe | Dario Gartmann |
In-app purchases
Caliper&Ruler
- Remove Ads$2.99
Rusty.
- Rusty. Premium$2.99









