# IPST Bio vs Infinity Math

The clearest difference is in-app purchases: IPST Bio at none against Infinity Math's 1. IPST Bio also leads on ads (none vs shown) and iOS requirement (6.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. Infinity Math sells 1 one-off in-app purchase. IPST Bio asks for nothing beyond the download.

## The numbers

| Metric | IPST Bio | Infinity Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | — |
| Size | 279 MB | 26 MB |
| Requires iOS | **6.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Institute for the Promotion of Teaching Science and Technology (IPST)](https://appshunter.io/developer/643591471) | [masato nishikawa](https://appshunter.io/developer/6776209987) |

## What reviewers say

### IPST Bio

[App page](https://appshunter.io/ios/app/ipst-bio/id1169409440)

**Features:** macOS Compatibility

**In-app purchases:** none


### Infinity Math

[App page](https://appshunter.io/ios/app/infinity-math-mental-math/id6794262892)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を消す | $6.99 | one-time |


## Frequently asked questions

### Is IPST Bio free?

IPST Bio is free to download, with no in-app purchases.

### Is Infinity Math free?

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

### Do IPST Bio or Infinity Math have ads?

Infinity Math shows ads; IPST Bio does not.

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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.*