# 相対性理論計 vs Pocket Experiments Science Lab

The clearest difference is in-app purchases: 相対性理論計 at none against Pocket Experiments Science Lab's 1. 相対性理論計 also leads on ads (none vs shown) and update cadence (daily vs every 9 days). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Pocket Experiments Science Lab sells 1 one-off in-app purchase. 相対性理論計 asks for nothing beyond the download.

相対性理論計 ships an update daily, Pocket Experiments Science Lab every 9 days. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 相対性理論計 | Pocket Experiments Science Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 9 days |
| Size | 8 MB | 12 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TAKEHITO AWASHIMA](https://appshunter.io/developer/1886038610) | [MIZOU, CO., LTD.](https://appshunter.io/developer/1542553141) |

## What reviewers say

### 相対性理論計

[App page](https://appshunter.io/ios/app/id6804165772)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Pocket Experiments Science Lab

[App page](https://appshunter.io/ios/app/pocket-experiments-science-lab/id6810875310)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $29.99 | one-time |


## Frequently asked questions

### Is 相対性理論計 free?

相対性理論計 is free to download, with no in-app purchases.

### Is Pocket Experiments Science Lab free?

Pocket Experiments Science Lab is free to download, with in-app purchases available.

### Do 相対性理論計 or Pocket Experiments Science Lab have ads?

Pocket Experiments Science Lab shows ads; 相対性理論計 does not.

### Which is updated more often, 相対性理論計 or Pocket Experiments Science Lab?

相対性理論計 ships an update daily, and Pocket Experiments Science Lab every 9 days. Most recently, 相対性理論計 was updated on October 13, 2026 and Pocket Experiments Science Lab on October 24, 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.*