# Calculator+ 秘密のブラウザとメモ vs Protractor Measuring Angle

The clearest difference is in-app purchases: Protractor Measuring Angle at none against Calculator+ 秘密のブラウザとメモ's 1. Protractor Measuring Angle also leads on update cadence (every 2 days vs every 4 days) and iOS requirement (17.0 vs 26.1). On price, ads and device support there is nothing between them.

Both are free to download. Calculator+ 秘密のブラウザとメモ sells 1 one-off in-app purchase. Protractor Measuring Angle asks for nothing beyond the download.

Calculator+ 秘密のブラウザとメモ ships an update every 4 days, Protractor Measuring Angle every 2 days. Both last shipped on October 2, 2026.

## The numbers

| Metric | Calculator+ 秘密のブラウザとメモ | Protractor Measuring Angle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/protractor-measuring-angle/id6785106013/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | — | Free |
| Size | 1 MB | 16 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Tomo Takahashi](https://appshunter.io/developer/1858509733) | [MSR TECH LLP](https://appshunter.io/developer/1761560109) |

## What reviewers say

### Calculator+ 秘密のブラウザとメモ

[App page](https://appshunter.io/ios/app/calculator-plus/id6756207467)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro版 | $2.99 | one-time |


### Protractor Measuring Angle

[App page](https://appshunter.io/ios/app/protractor-measuring-angle/id6785106013)

This app transforms your iPhone into a versatile digital measuring tool. It offers multiple functions to measure angles, slopes, distances, and even height using your device's sensors and camera. Save and review your measurement history for future reference.

**Highlights:** Inclinometer for real-time tilt measurement, Screen protractor for precise angle reading, Camera level with horizon overlay, Photo angle measurement on existing images, Height calculator using trigonometry, AR Measure for 3D space measurements, On-screen ruler and digital compass

**In-app purchases:** none


## Frequently asked questions

### Is Calculator+ 秘密のブラウザとメモ free?

Calculator+ 秘密のブラウザとメモ is free to download, with in-app purchases available.

### Is Protractor Measuring Angle free?

Protractor Measuring Angle is free to download, with no in-app purchases.

### Do Calculator+ 秘密のブラウザとメモ or Protractor Measuring Angle have ads?

Neither Calculator+ 秘密のブラウザとメモ nor Protractor Measuring Angle shows ads.

### Which is updated more often, Calculator+ 秘密のブラウザとメモ or Protractor Measuring Angle?

Calculator+ 秘密のブラウザとメモ ships an update every 4 days, and Protractor Measuring Angle every 2 days. Most recently, Calculator+ 秘密のブラウザとメモ was updated on October 2, 2026 and Protractor Measuring Angle on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*