# Quantum vs Grainfall

The clearest difference is in-app purchases: Quantum at none against Grainfall's 6. Quantum also leads on update cadence (every 4 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Grainfall sells 6 one-off in-app purchases. Quantum asks for nothing beyond the download.

Quantum ships an update every 4 days, Grainfall fortnightly. The most recent releases landed on October 4, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Quantum | Grainfall |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 1 MB | 17 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Celal Can Sagnak](https://appshunter.io/developer/1865753496) | [Hrdlicka Apps LLC](https://appshunter.io/developer/1896342974) |

## What reviewers say

### Quantum

[App page](https://appshunter.io/ios/app/quantum-cat/id6759192936)

**Features:** macOS Compatibility

**In-app purchases:** none


### Grainfall

[App page](https://appshunter.io/ios/app/grainfall/id6773977789)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25 Coins | $0.99 | one-time |
| Starter Pack — 120 Coins | $1.99 | one-time |
| 90 Coins | $2.99 | one-time |
| Premium Unlock | $3.99 | one-time |
| 175 Coins | $4.99 | one-time |
| 400 Coins | $9.99 | one-time |


## Frequently asked questions

### Is Quantum free?

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

### Is Grainfall free?

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

### Do Quantum or Grainfall have ads?

Neither Quantum nor Grainfall shows ads.

### Which is updated more often, Quantum or Grainfall?

Quantum ships an update every 4 days, and Grainfall fortnightly. Most recently, Quantum was updated on October 4, 2026 and Grainfall on September 30, 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.*