# OpenDNA vs 相対性理論計

The clearest difference is in-app purchases: OpenDNA at none against 相対性理論計's 1. OpenDNA also leads on iOS requirement (13.0 vs 17.0). 相対性理論計's advantage is update cadence (daily vs monthly). On price, ads and device support there is nothing between them.

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

OpenDNA ships an update monthly, 相対性理論計 daily. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | OpenDNA | 相対性理論計 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/opendna/id1620832341/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 95.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | Free | — |
| Size | 116 MB | 8 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [OpenDNA Inc.](https://appshunter.io/developer/994101524) | [TAKEHITO AWASHIMA](https://appshunter.io/developer/1886038610) |

## What reviewers say

### OpenDNA

[App page](https://appshunter.io/ios/app/opendna/id1620832341)

Explore art and philosophy through engaging 5-minute lessons and daily activities. Develop your critical thinking skills by discovering new concepts and recording your insights in a personal notepad.

**Highlights:** 5-minute learning content, Daily unusual activities, Personal notepad for discoveries, Explore Cubism, Learn about Haiku, Study light and shade in art, Investigate Western philosophy

**Features:** Vision Pro support

**In-app purchases:** none


### 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 (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SF & Cosmic Dial Faces | $1.99 | one-time |


## Frequently asked questions

### Is OpenDNA free?

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

### Is 相対性理論計 free?

相対性理論計 is free to download, with in-app purchases available.

### Do OpenDNA or 相対性理論計 have ads?

Neither OpenDNA nor 相対性理論計 shows ads.

### Which is updated more often, OpenDNA or 相対性理論計?

OpenDNA ships an update monthly, and 相対性理論計 daily. Most recently, OpenDNA was updated on November 3, 2026 and 相対性理論計 on November 5, 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.*