# Tetraom vs Yìjīng

The clearest difference is price: Tetraom at Free against Yìjīng's $7.79. Tetraom also leads on update cadence (every 8 days vs every 5 weeks). Yìjīng's advantage is in-app purchases (none vs 11) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Tetraom is free to download; Yìjīng costs $7.79 up front. Tetraom sells 9 in-app purchases, starting at $5.99 per month. Yìjīng asks for nothing beyond the download.

Tetraom ships an update every 8 days, Yìjīng every 5 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Tetraom | Yìjīng |
| --- | --- | --- |
| Price | **Free** | $7.79 |
| Rating | **[4.5 (4 ratings)](https://appshunter.io/ios/app/tetraom/id6605932798/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 89 MB | 37 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [MEDIAONE EOOD](https://appshunter.io/developer/1721740893) | [Corpora Inc](https://appshunter.io/developer/1808739895) |

## What reviewers say

### Tetraom

[App page](https://appshunter.io/ios/app/tetraom/id6605932798)

This app provides a personalized navigation system for clarity and timing, integrating time cycles and individual mechanics. It offers daily insights into strengths, pauses, and life themes, with options to explore deeper monthly and yearly contexts. The system is designed for quick daily use to enhance orientation and action.

**Highlights:** Personalized daily flow insights, Moment Axis for daily structure, Daily Pulse with strengths and pauses, Four life themes: Health, Money, Love, Family, Innate Essence foundation, Monthly and yearly context exploration, Relationship compatibility analysis

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $5.99 | per month |
| Ultra Pro Monthly | $8.99 | per month |
| Ultra Pro Monthly | $9.99 | per month |
| Three Months | $11.99 | per 3 months |
| Ultra Pro Three Months | $17.99 | per 3 months |
| Annual | $29.99 | per year |
| Ultra Pro Annual | $49.99 | per year |
| Expanded Reading on 7 Themes | $8.99 | one-time |
| Detailed 7-Theme HD Reading | $12.99 | one-time |


### Yìjīng

[App page](https://appshunter.io/ios/app/yijing/id6744656859)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tetraom free?

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

### Is Yìjīng free?

Yìjīng costs $7.79, with no in-app purchases.

### Do Tetraom or Yìjīng have ads?

Tetraom shows ads; Yìjīng does not.

### Which is updated more often, Tetraom or Yìjīng?

Tetraom ships an update every 8 days, and Yìjīng every 5 weeks. Most recently, Tetraom was updated on October 24, 2026 and Yìjīng 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.*