# Clavis vs LuckyGravity

The clearest difference is in-app purchases: Clavis at none against LuckyGravity's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. LuckyGravity sells 3 one-off in-app purchases. Clavis asks for nothing beyond the download.

Clavis ships an update every 5 days, LuckyGravity weekly. The most recent releases landed on September 18, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Clavis | LuckyGravity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Size | 24 MB | 36 MB |
| Requires iOS | **16.2** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Pedro Henrique Oliveira Sousa](https://appshunter.io/developer/1875393541) | [JIANTAO WENG](https://appshunter.io/developer/879902334) |

## What reviewers say

### Clavis

[App page](https://appshunter.io/ios/app/clavis-planetary-clock/id6758866461)

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

**In-app purchases:** none


### LuckyGravity

[App page](https://appshunter.io/ios/app/luckygravity/id6763566926)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Points | $0.99 | one-time |
| 500 Points | $3.99 | one-time |
| 1200 Points | $7.99 | one-time |


## Frequently asked questions

### Is Clavis free?

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

### Is LuckyGravity free?

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

### Do Clavis or LuckyGravity have ads?

Neither Clavis nor LuckyGravity shows ads.

### Which is updated more often, Clavis or LuckyGravity?

Clavis ships an update every 5 days, and LuckyGravity weekly. Most recently, Clavis was updated on September 18, 2026 and LuckyGravity on September 6, 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.*