# 识图取字pro vs Bio

The clearest difference is price: Bio at Free against 识图取字pro's $2.99. Bio also leads on update cadence (every 2 weeks vs every 3 months) and rating (5.0 vs 4.7). 识图取字pro's advantage is in-app purchases (none vs 3) and ratings volume (13 vs 2). On ads and device support there is nothing between them.

Bio is free to download; 识图取字pro costs $2.99 up front. Bio sells 3 in-app purchases, starting at $2.99 per month. 识图取字pro asks for nothing beyond the download.

Bio holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: 识图取字pro has 13 ratings behind it against 2, so its average is the more settled of the two.

识图取字pro ships an update every 3 months, Bio every 2 weeks. The most recent releases landed on September 23, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 识图取字pro | Bio |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.7 (13 ratings)](https://appshunter.io/ios/app/pro/id1519701997/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/bio-calculator/id6498629520/reviews)** |
| Number of ratings | **13** | 2 |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | **Freemium** |
| Size | 31 MB | 51 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [岚 赵](https://appshunter.io/developer/1352261434) | [杰 吴](https://appshunter.io/developer/1729187814) |

## What reviewers say

### 识图取字pro

[App page](https://appshunter.io/ios/app/pro/id1519701997)

This utility app converts images to text, translates scanned content into multiple languages, and offers robust file management features. It allows for editing, saving, and sharing documents, with options for various filters and a powerful proofreading tool.

**Highlights:** Scan images to text (OCR), Translate text to multiple languages, Edit, save, and manage documents, Copy, paste, and share via email/PDF, Automatic recognition and document merging, Document filters and proofreading, High-definition scanning with auto-cropping

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

**In-app purchases:** none


### Bio

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

This scientific assistant provides researchers and students with essential tools for everyday lab calculations. It offers modules for protein and nucleic acid conversions, solution preparation, microbiology, and buffer recipes. Streamline your laboratory workflow with precise and efficient scientific computations.

**Highlights:** Protein & Peptide Conversion, Nucleic Acid & Genomics Toolkit, Biochemistry & Solution Preparation, Microbiology & Cell Culture Tools, Buffer & Solution Preparation Library, Native iOS Performance

**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 |


## Frequently asked questions

### Is 识图取字pro free?

识图取字pro costs $2.99, with no in-app purchases.

### Is Bio free?

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

### Which has better reviews, 识图取字pro or Bio?

Bio is rated higher. 识图取字pro averages 4.7 out of 5 from 13 ratings, while Bio averages 5.0 from 2 ratings.

### Do 识图取字pro or Bio have ads?

Neither 识图取字pro nor Bio shows ads.

### Which is updated more often, 识图取字pro or Bio?

识图取字pro ships an update every 3 months, and Bio every 2 weeks. Most recently, 识图取字pro was updated on September 23, 2026 and Bio on September 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.*