# 氨基酸记忆卡 vs Triangle Calculate & Visualize

The clearest difference is price: 氨基酸记忆卡 at Free against Triangle Calculate & Visualize's $0.95. Triangle Calculate & Visualize's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 3 months). On ads, device support and iOS requirement there is nothing between them.

氨基酸记忆卡 is free to download; Triangle Calculate & Visualize costs $0.95 up front. 氨基酸记忆卡 sells 1 one-off in-app purchase. Triangle Calculate & Visualize asks for nothing beyond the download.

氨基酸记忆卡 ships an update every 3 months, Triangle Calculate & Visualize every 3 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 氨基酸记忆卡 | Triangle Calculate & Visualize |
| --- | --- | --- |
| Price | **Free** | $0.95 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/triangle-calculate-and-visualize/id6767890883/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 27 MB | 19 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [锐坚 许](https://appshunter.io/developer/668626907) | [健 黄](https://appshunter.io/developer/1716262021) |

## What reviewers say

### 氨基酸记忆卡

[App page](https://appshunter.io/ios/app/id6523431549)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 购买一年使用权 | $1.99 | one-time |


### Triangle Calculate & Visualize

[App page](https://appshunter.io/ios/app/triangle-calculate-and-visualize/id6767890883)

This tool calculates triangle properties like side lengths, angles, area, and perimeter. It visually displays results with clear graphics, aiding understanding for students, educators, and professionals. Supports various units, precision settings, and multiple languages.

**Highlights:** Calculate side lengths, angles, area, and perimeter, Visualize triangle results graphically, Set angle units (degrees/radians), Adjust calculation precision, Supports light, dark, and system themes, Multilingual interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 氨基酸记忆卡 free?

氨基酸记忆卡 is free to download, with in-app purchases available.

### Is Triangle Calculate & Visualize free?

Triangle Calculate & Visualize costs $0.95, with no in-app purchases.

### Do 氨基酸记忆卡 or Triangle Calculate & Visualize have ads?

Neither 氨基酸记忆卡 nor Triangle Calculate & Visualize shows ads.

### Which is updated more often, 氨基酸记忆卡 or Triangle Calculate & Visualize?

氨基酸记忆卡 ships an update every 3 months, and Triangle Calculate & Visualize every 3 weeks. Most recently, 氨基酸记忆卡 was updated on October 27, 2026 and Triangle Calculate & Visualize on October 28, 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.*