# 100cm Ruler > Digital ruler app for measuring small objects with millimeter scale. (iPhone/iPad app by ZOOMO, Inc..) - Source: https://appshunter.io/ios/app/100cm-ruler/id982815744 (this page in markdown: same URL + `.md`) - Developer: [ZOOMO, Inc.](https://appshunter.io/developer/490112424) - Category: Productivity, Lifestyle - Price: Free with in-app purchases - Rating: 4.00/5 from 1 App Store ratings · 51 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 62 MB - Languages: American English, Japanese - Released: 2015-05-29 - Data updated: 2026-06-11 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/100cm-ruler/id982815744/reviews.md ## What is 100cm Ruler? Plotting scale is useful to measure the length of small articles and insects. Squared in millimeters on the lower left, thus the diameter can be measured roughly. Hold the screen and slide your iPhone to the right. https://www.youtube.com/watch?v=kxU9xi88IiY Ads can be removed on "Info page". ## Key features - Digital ruler functionality - Millimeter scale - Diameter measurement - Screen sliding for measurement - Ad removal option ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove ADS | $1.99 | one-time | ## Recent user reviews (10 of 51) All indexed reviews: https://appshunter.io/ios/app/100cm-ruler/id982815744/reviews.md ### 1/5 — 長年愛用してますが… *2026-03-03, version 2024.10.2* SE2から17に変更したら、表示サイズがおかしくなったので使えません。今までありがとうございました。 ### 4/5 — アップデート忘れずに *2024-12-20, version 2024.10.2* アップデートしないまま12miniから16proになり、なんか大きなまま測って間違って電球買いました。コントかと思った😂アプデすれば大丈夫ですが盲信してる自分に気付けました。 ### 1/5 — アップデート感全く無し *2024-09-14, version 2024.9* iphone15pro使用してますが、全くなおりません。もう修正は不可能なんでしょうね。すごく良いアプリだったので、いつかはまた使える日が来るととすごい期待してたんですけど。残念です。 ### 3/5 — まあまあ *2024-08-31, version 2024.6* まあまあ良いです ### 5/5 — 修正されました。 *2024-06-02, version 2024.6* アップデートでスケールの調整されてました。安心しました😁 ### 5/5 — いいね👍 *2024-04-19, version 2024.4* iPhone14PROMAX利用中です アプデされて良かった。ちょいちょい使ってますが、かなり便利！これからもアプデよろしくお願いします。✌️ ### 5/5 — アプデしました *2024-04-13, version 2024.4* アプデ対応ありがとう！ ### 1/5 — iPhone 14 Proでは直ってない *2024-04-11, version 2024.4* もはや、開発停止なんだとばっかり思っていました。 iPhone 13 Proの対応はできている感じです、ノギスで測ってみました。 しかしiPhone 14 Proでは依然として3mmほどずれています。 ### 1/5 — 最低 *2024-02-24, version 2023.8* １もつけたくない ### 3/5 — iPhone15 pro max 非対応 *2024-02-03, version 2023.8* 良さそうなので購入しようと思い、実際の定規で最終チェックしましたが、メモリが3割ぐらい大きいのとZERO位置まで移動できない。残念ながら見送りです。 対応したら購入したいです。よろしくお願いします。 ## Frequently asked questions about 100cm Ruler ### What can I measure with 100cm Ruler? 100cm Ruler is designed for measuring the length and diameter of small articles and insects with its millimeter scale. ### How do I use 100cm Ruler to measure? You can hold the screen and slide your iPhone to the right to measure the length of an object placed on the screen. ### Is 100cm Ruler free to use? Yes, 100cm Ruler is available for free. You can also remove ads through an in-app purchase on the 'Info page'. ### What devices does 100cm Ruler support? 100cm Ruler is compatible with iPhone and iPod devices. ### How accurate is 100cm Ruler? The app features a squared millimeter scale for rough diameter measurements and is useful for measuring small articles. ### How often is 100cm Ruler updated? The latest version is 2024.10.2, and it was last updated on October 20, 2024, indicating regular updates. ### What is the age rating for 100cm Ruler? 100cm Ruler has an age rating of 4+, making it suitable for a wide range of users. ### Does 100cm Ruler have ads? The app is free and contains advertisements. These ads can be removed via an in-app purchase. ## Version history (last 5 releases) ### 2024.10.2 — 2024-10-20 Compatible with iPhone16Pro Max. ### 2024.10 — 2024-10-14 Compatible with iPhone16 Pro. Please wait a little longer for iPhone16 Pro Max. ### 2024.9 — 2024-09-14 The display has been adjusted. Compatibility with the iPhone 16 series requires adjustment on the actual device, so please wait. ### 2024.6 — 2024-06-01 Adjusted the layout display. ### 2024.4.3 — 2024-04-21 We have adjusted the ruler display on the Max series for iPhone 13 and later. ## Apps similar to 100cm Ruler | App | Rating | Price | Category | | --- | --- | --- | --- | | [Photo Measure: Image Meter](https://appshunter.io/ios/app/photo-measure-image-meter/id6446276642) | 4.0 (83) | Free | Productivity | | [Measuring Tape, Photo Ruler](https://appshunter.io/ios/app/measuring-tape-photo-ruler/id1020133524) | 4.2 (2,566) | Free | Productivity | | [AR Ruler: Digital Tape Measure](https://appshunter.io/ios/app/ar-ruler-digital-tape-measure/id1326773975) | 4.7 (943) | Free | Productivity | | [3D Snap: LiDAR Scanner & Ruler](https://appshunter.io/ios/app/3d-snap-lidar-scanner-and-ruler/id6477467417) | 4.1 (81) | Free | Productivity | | [Tape Measure Camera AR Ruler](https://appshunter.io/ios/app/tape-measure-camera-ar-ruler/id1078675465) | 4.2 (777) | Free | Productivity | | [Pro Ruler - Measuring Tape](https://appshunter.io/ios/app/pro-ruler-measuring-tape/id1541122485) | 4.2 (155) | Free | Productivity | ## More apps by ZOOMO, Inc. - [AnzanDojo](https://appshunter.io/ios/app/anzandojo/id490112421) - [Moe! Omikuji](https://appshunter.io/ios/app/moe-omikuji/id529539938) - [Power Stone](https://appshunter.io/ios/app/power-stone/id532068372) - [Kids Camera & Clock](https://appshunter.io/ios/app/kids-camera-and-clock/id845038076) - [Soccer Score Board & Timer](https://appshunter.io/ios/app/soccer-score-board-and-timer/id892738727) - [Score Board & Timer](https://appshunter.io/ios/app/score-board-and-timer/id896727172) All apps by ZOOMO, Inc.: https://appshunter.io/developer/490112424 ## Related topics [ruler cm](https://appshunter.io/ios/topics/ruler-cm) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*