# Vector Field vs Mahjong Jussei

The clearest difference is in-app purchases: Vector Field at none against Mahjong Jussei's 2. Vector Field also leads on device support (4 vs 1) and iOS requirement (15.0 vs 17.0). Mahjong Jussei's advantage is update cadence (fortnightly vs every 3 months). On price and ads there is nothing between them.

Both are free to download. Mahjong Jussei sells 2 in-app purchases, starting at $4.99 per month. Vector Field asks for nothing beyond the download.

Vector Field ships an update every 3 months, Mahjong Jussei fortnightly. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Vector Field | Mahjong Jussei |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/vector-field-particle-flow/id1598282424/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 1 MB | 67 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Eliott Morgensztern](https://appshunter.io/developer/1478504124) | [飞 费](https://appshunter.io/developer/6782095618) |

## What reviewers say

### Vector Field

[App page](https://appshunter.io/ios/app/vector-field-particle-flow/id1598282424)

Visualize mathematical vector fields with animated particles in 2D, 3D, or spherical spaces. Input custom equations and adjust simulation parameters in real-time to explore dynamical systems and mathematical patterns interactively.

**Highlights:** 2D, 3D, and spherical vector field visualization, Customizable dx, dy, dz equations, Adjustable particle speed, density, and colors, Time-dependent field animation, Interactive 3D view rotation, Real-time rendering powered by Metal

**Features:** Vision Pro support

**In-app purchases:** none


### Mahjong Jussei

[App page](https://appshunter.io/ios/app/mahjong-jussei/id6782351906)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mahjong Jussei Pro Monthly | $4.99 | per month |
| Mahjong Jussei Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Vector Field free?

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

### Is Mahjong Jussei free?

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

### Do Vector Field or Mahjong Jussei have ads?

Neither Vector Field nor Mahjong Jussei shows ads.

### Which is updated more often, Vector Field or Mahjong Jussei?

Vector Field ships an update every 3 months, and Mahjong Jussei fortnightly. Most recently, Vector Field was updated on November 3, 2026 and Mahjong Jussei on October 25, 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.*