# Bio vs Guide4U

The clearest difference is iOS requirement: Guide4U at 15.1 against Bio's 17.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Bio sells 3 one-off in-app purchases and Guide4U sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Bio ships an update every 6 months, Guide4U every 7 months. The most recent releases landed on October 17, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Bio | Guide4U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/bio-compatibility-analysis/id566991076/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free | — |
| Size | 6 MB | 32 MB |
| Requires iOS | 17.5 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 12+ |
| Developer | [Biological Immunity Research Institute](https://appshunter.io/developer/566991079) | [Berkay Donmez](https://appshunter.io/developer/1805661190) |

## What reviewers say

### Bio

[App page](https://appshunter.io/ios/app/bio-compatibility-analysis/id566991076)

Discover deeper connections by analyzing your birth date for physical, mental, and emotional compatibility with others. This tool helps you understand relationship dynamics and find more fulfilling partnerships.

**Highlights:** Birth date compatibility analysis, Physical compatibility assessment, Mental compatibility assessment, Emotional compatibility assessment, Relationship insight tool

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Credit | $1.99 | one-time |
| 5 Credits | $3.99 | one-time |
| 10 Credits | $4.99 | one-time |


### Guide4U

[App page](https://appshunter.io/ios/app/guide4u-social-coach/id6744621104)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $9.99 | per month |
| Annual Premium | $69.99 | per year |


## Frequently asked questions

### Is Bio free?

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

### Is Guide4U free?

Guide4U is free to download, with in-app purchases available.

### Do Bio or Guide4U have ads?

Neither Bio nor Guide4U shows ads.

### Which is updated more often, Bio or Guide4U?

Bio ships an update every 6 months, and Guide4U every 7 months. Most recently, Bio was updated on October 17, 2026 and Guide4U 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.*