# Tool Box: Ruler & Protractor — Bubble Level & Angle Finder

> Bubble Level & Angle Finder (iPhone/iPad app by Takashi EIKI.)

- Source: https://appshunter.io/ios/app/tool-box-ruler-and-protractor/id6823929895 (this page in markdown: same URL + `.md`)
- Developer: [Takashi EIKI](https://appshunter.io/developer/6821840904)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 23 MB
- Languages: American English, Japanese
- Released: 2026-10-20
- Data updated: 2026-11-10

## What is Tool Box?

Ruler, protractor, bubble level, magnifier, slow-motion timer and car leveling in one app.
Tool Box lets you tune each tool to your own phone, using things you already have.

RULER
- Measure length with a scale along the long edge of the screen and two movable cursors
- Shows mm, cm and inches (also traditional Japanese shaku/sun units)
- Hold a credit card or a US coin (quarter, dime, nickel or penny) against the screen to calibrate the scale to your device. The estimated error after calibration is shown

PROTRACTOR
- Drag two arms on screen to measure an angle
- Camera protractor: lay the arms over the live camera view to measure real angles such as stairs and slopes. You can freeze the image and adjust it

BUBBLE LEVEL
- Lay the phone flat for a round bubble level; stand it up for a bar level and plumb bob. The app switches automatically
- Shows degrees or percent grade
- Calibrate by placing the phone down and turning it 180 degrees to cancel the offset of the phone or its case. Save separate offsets, for example "with case" and "without case"
- A green display and vibration tell you when you are within tolerance, and a sound can too
- Hold button to freeze the reading

MAGNIFIER
- Magnify the camera view to read small print and see small parts. Flashlight supported
- Freeze the image and zoom in further to check details
- Measure size: place a credit card next to the object, line up the reference marks and the measuring lines, and the length is shown in mm, cm or inches (up to 5 lines). The more you zoom in when lining up, the smaller the error. The estimated error is shown

SLOW MOTION
- Record at up to 240 frames per second (depends on the device) and play back at 1/8 speed or step frame by frame
- Mark two frames A and B to see the time between them in milliseconds
- Put a card in the same plane as the moving object to estimate its speed (m/s, mph, km/h) from the distance it moves
- Save the video to your Photos app

CAR LEVELING
- Place the phone in your car or camper to see how much to raise each tire to get level
- Choose a vehicle type or enter your own wheelbase and track width (cm)
- Use only while parked, with the engine off and the parking brake set

OTHER
- The home screen lists the tools so you can pick one. You can also open the last-used tool at launch
- Measurements and calibration values are stored only on your device
- Contains ads

NOTE
These are simple measurements using the phone's sensors and screen, and results vary by device. For construction or work that needs precision, use a dedicated measuring instrument.

## Is Tool Box safe?

Not enough ratings yet to assess Tool Box.

## Is Tool Box legit?

Tool Box: Ruler & Protractor appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Tool Box is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.3 — 2026-11-08

Now available in English. All tools, settings and messages can be used in English.

### 1.2.1 — 2026-11-07

・設定に「App Store で評価する」と「開発者のほかのアプリ」を追加しました。
・ご意見をお寄せいただけるよう、しばらくお使いいただいたあとに、評価のお願いを表示することがあります(計測の途中には表示しません)。

### 1.2 — 2026-10-25

・スロー撮影を追加しました。最大 240 コマ/秒で撮影し、コマ送りで時間を、カードや硬貨を基準に速さを測れます。動画は写真アプリに保存できます。
・最初の画面にツールを並べ、選んで使う形にしました。前回使ったツールで起動することもできます(設定)。
・広告の表示を画面幅に合わせました。

### 1.1 — 2026-10-24

・拡大鏡を追加しました。カメラの映像を拡大して細部を見られるほか、カードや硬貨を基準にして、写した物の寸法を測れます。

### 1.0 — 2026-10-21

No release notes.

## More apps by Takashi EIKI

- [WorkOutLog: Rest Timer & PR](https://appshunter.io/ios/app/workoutlog-rest-timer-and-pr/id6821840902)
- [Tides for Fishing 潮見表・タイドグラフ](https://appshunter.io/ios/app/tides-for-fishing/id6822296598)
- [本棚管理ノート](https://appshunter.io/ios/app/id6826556006)
- [Breaking Through Limits: 1RM](https://appshunter.io/ios/app/breaking-through-limits-1rm/id6829056756)

All apps by Takashi EIKI: https://appshunter.io/developer/6821840904

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*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 2026-11-10.*