Digital Ruler vs SnapSize
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Digital Ruler
Measure small objects directly on your device's screen. Adjust the on-screen area to match the item's dimensions and get precise width, height, and diagonal measurements in centimeters or inches.
- Measure width, height, and diagonal
- Supports centimeters and inches
- Adjustable on-screen measurement area
- Works on iPhone and iPad
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With Digital Ruler you can measure all the the small things which fit on the screen of your iDevice. Just adjust the size of the white area to the size of the item you want to measure. Digital Ruler will show you the width, the height and the diagonal of the item in centimeters or inches. Warning: Do NOT put heavy, sharp or other dangerous things on your iPad screen! This will damage your iPad. We will not be responsible for any damage!
SnapSize
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SnapSize is an app that allows you to measure the length of objects captured by the camera at any time, whenever you need. It enables you to store both the camera images and 3D data together, so if you're unable to measure immediately or if you made a mistake in selecting the measurement point, you can use the app to measure later. The results of your measurements can be saved as images, making it easy to share information or add them to documents. [Main Features] ・Capture and save the data. ・Measure distances anytime by using the saved data. ・Output the results of depth since 3D data is saved. ・Save and share captured data and measurement results. [compatible devices] iPhone 11 Pro iPhone 11 Pro Max iPhone 12 Pro iPhone 12 Pro Max iPhone 13 Pro iPhone 13 Pro Max iPhone 14 Pro iPhone 14 Pro Max iPhone 15 Pro iPhone 15 Pro Max iPhone 16 Pro iPhone 16 Pro Max iPad Pro 11-inch iPad Pro 12.9-inch iPad Pro 13.0-inch
Screenshots
Verdict
The clearest difference is update cadence: SnapSize at every 6 months against Digital Ruler's every 128 months. SnapSize also leads on iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Digital Ruler ships an update every 128 months, SnapSize every 6 months. The most recent releases landed on September 7, 2026 and September 11, 2026 respectively.
| Parameter | Digital Ruler | SnapSize |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 128 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 108 MB |
| Age rating | 4+ | 4+ |
| Developer | Nguyen Nam Giang | System Friend, Inc. |
In-app purchases
Digital Ruler
No in-app purchases
SnapSize
No in-app purchases
