# Bio vs 图片压缩

The clearest difference is in-app purchases: 图片压缩 at none against Bio's 3. Bio's advantage is update cadence (every 3 weeks vs every 10 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Bio sells 3 in-app purchases, starting at $2.99 per month. 图片压缩 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Bio against 5.0 for 图片压缩. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Bio ships an update every 3 weeks, 图片压缩 every 10 months. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Bio | 图片压缩 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/bio-calculator/id6498629520/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/id6503405460/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 10 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 51 MB | 13 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [杰 吴](https://appshunter.io/developer/1729187814) | [上海勋鸿文化传播有限公司](https://appshunter.io/developer/1530349358) |

## What reviewers say

### Bio

[App page](https://appshunter.io/ios/app/bio-calculator/id6498629520)

This app provides essential life science calculations for researchers and students. It simplifies complex tasks like solution preparation, cell counting, and molecular conversions, offering detailed calculation steps for lab notes and reports.

**Highlights:** Solution preparation calculations, Nucleic acid and protein conversions, Manual cell counting with labels, Cell density and seeding calculations, Molecular weight and GC content, Lab solution recipes and notes

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Yearly Plan | $19.99 | per year |
| Lifetime member | $44.99 | one-time |


### 图片压缩

[App page](https://appshunter.io/ios/app/id6503405460)

This utility tool allows you to compress images to a specific KB size, perfect for various online platforms. It supports batch compression and automatically organizes saved images into a dedicated album for easy management. Continuous updates are planned.

**Highlights:** Compress images to target KB size, Batch compression, Automatic album creation for saved images, Easy image management, Continuous feature updates

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

**In-app purchases:** none


## Frequently asked questions

### Is Bio free?

Bio is free to download, with in-app purchases available.

### Is 图片压缩 free?

图片压缩 is free to download, with no in-app purchases.

### Which has better reviews, Bio or 图片压缩?

Bio and 图片压缩 are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Bio or 图片压缩 have ads?

Neither Bio nor 图片压缩 shows ads.

### Which is updated more often, Bio or 图片压缩?

Bio ships an update every 3 weeks, and 图片压缩 every 10 months. Most recently, Bio was updated on November 8, 2026 and 图片压缩 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.*