# アミノ酸の分子量計算AminoCalc vs Boost.AI 英作文添削・共通テスト英語

The clearest difference is in-app purchases: アミノ酸の分子量計算AminoCalc at none against Boost.AI 英作文添削・共通テスト英語's 3. アミノ酸の分子量計算AminoCalc also leads on review sentiment (100% vs 90%). Boost.AI 英作文添削・共通テスト英語's advantage is update cadence (every 4 days vs every 8 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Boost.AI 英作文添削・共通テスト英語 sells 3 in-app purchases, starting at $5.99 per month. アミノ酸の分子量計算AminoCalc asks for nothing beyond the download.

アミノ酸の分子量計算AminoCalc ships an update every 8 days, Boost.AI 英作文添削・共通テスト英語 every 4 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | アミノ酸の分子量計算AminoCalc | Boost.AI 英作文添削・共通テスト英語 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 90.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 4 days** |
| Monetization | **Free** | Freemium |
| Size | 39 MB | 151 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Touhara](https://appshunter.io/developer/1268738829) | [ATSUSHI KIMURA](https://appshunter.io/developer/1829870349) |

## What reviewers say

### アミノ酸の分子量計算AminoCalc

[App page](https://appshunter.io/ios/app/aminocalc/id1524110481)

This app calculates the molecular weight of amino acids using 3-letter, 1-letter, or codon input. It also includes a quiz to test your knowledge of amino acids, with new quiz content added based on organic chemistry structures.

**Highlights:** Calculate molecular weight of amino acids, Input via 3-letter, 1-letter, or codon, Amino acid knowledge quiz, Organic chemistry structure-based quiz content, Convenient for research on iPhone/iPad

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

**In-app purchases:** none


### Boost.AI 英作文添削・共通テスト英語

[App page](https://appshunter.io/ios/app/boostai/id6749287559)

Practice past exams for the Common Test in English and get AI-powered essay feedback. Improve reading, listening, and writing skills with AI-driven corrections and explanations. Review vocabulary and grammar to prepare for university entrance exams and English proficiency tests.

**Highlights:** Common Test English past paper practice, AI essay correction and scoring, Reading and listening practice with audio, Vocabulary and grammar review, Handwritten answer input via photo, AI chat for clarification

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Boost Pro 月額プラン | $5.99 | per month |
| 3ヶ月 | $11.99 | per 3 months |
| Boost Pro 年額プラン | $39.99 | per year |


## Frequently asked questions

### Is アミノ酸の分子量計算AminoCalc free?

アミノ酸の分子量計算AminoCalc is free to download, with no in-app purchases.

### Is Boost.AI 英作文添削・共通テスト英語 free?

Boost.AI 英作文添削・共通テスト英語 is free to download, with in-app purchases available.

### Do アミノ酸の分子量計算AminoCalc or Boost.AI 英作文添削・共通テスト英語 have ads?

Neither アミノ酸の分子量計算AminoCalc nor Boost.AI 英作文添削・共通テスト英語 shows ads.

### Which is updated more often, アミノ酸の分子量計算AminoCalc or Boost.AI 英作文添削・共通テスト英語?

アミノ酸の分子量計算AminoCalc ships an update every 8 days, and Boost.AI 英作文添削・共通テスト英語 every 4 days. Most recently, アミノ酸の分子量計算AminoCalc was updated on October 29, 2026 and Boost.AI 英作文添削・共通テスト英語 on October 30, 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.*