# DrakeEquation vs Gravity Zen

The clearest difference is in-app purchases: DrakeEquation at none against Gravity Zen's 2. Gravity Zen's advantage is update cadence (every 9 days vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

DrakeEquation costs $0.99 and Gravity Zen $0.99 up front. Gravity Zen sells 2 one-off in-app purchases. DrakeEquation asks for nothing beyond the download.

DrakeEquation ships an update every 10 months, Gravity Zen every 9 days. The most recent releases landed on October 29, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | DrakeEquation | Gravity Zen |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | — | **[4.8 (70 ratings)](https://appshunter.io/ios/app/gravity-zen/id1602081846/reviews)** |
| Number of ratings | — | **70** |
| Positive reviews | — | 93.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 9 days** |
| Monetization | — | Paid |
| Size | 5 MB | 13 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [domesticusdevelop](https://appshunter.io/developer/373834594) | [Dominik Hauser](https://appshunter.io/developer/325836858) |

## What reviewers say

### DrakeEquation

[App page](https://appshunter.io/ios/app/drakeequation/id588682241)

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

**In-app purchases:** none


### Gravity Zen

[App page](https://appshunter.io/ios/app/gravity-zen/id1602081846)

Observe small circles interacting with a central gravity field. Add numerous boxes to explore how they naturally settle into a stable arrangement. It's a simple yet captivating simulation.

**Highlights:** Gravity field simulation, Add multiple objects, Observe stable configurations, Interactive physics, Minimalist design

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Large tip | $2.99 | one-time |


## Frequently asked questions

### Is DrakeEquation free?

DrakeEquation costs $0.99, with no in-app purchases.

### Is Gravity Zen free?

Gravity Zen costs $0.99, and also offers in-app purchases.

### Do DrakeEquation or Gravity Zen have ads?

Neither DrakeEquation nor Gravity Zen shows ads.

### Which is updated more often, DrakeEquation or Gravity Zen?

DrakeEquation ships an update every 10 months, and Gravity Zen every 9 days. Most recently, DrakeEquation was updated on October 29, 2026 and Gravity Zen on November 3, 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.*