Ruler msg vs Caliper&Ruler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler msg
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Ruler 定規 measuring 物の長さを測れます。ヤードとメトリックの２種類あります。デザインも変えられます。 You can measure the length of an object. There are two types: yard and metric. The design can be changed.
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.
Screenshots
Verdict
The clearest difference is in-app purchases: Ruler msg at none against Caliper&Ruler's 1. Ruler msg also leads on iOS requirement (16.1 vs 18.4). On price, update cadence, ads and device support 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. Ruler msg asks for nothing beyond the download.
Ruler msg ships an update every 5 weeks, Caliper&Ruler every 6 weeks. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.
| Parameter | Ruler msg | Caliper&Ruler |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.1 — better | 18.4 |
| Further details — not scored | ||
| Size | 6 MB | 5 MB |
| Age rating | 4+ | +4 |
| Developer | kenshin miyamoto | Jun Yamabe |
In-app purchases
Ruler msg
No in-app purchases
Caliper&Ruler
- Remove Ads$2.99
