# OilRhythm vs Boltfall

The clearest difference is in-app purchases: OilRhythm at none against Boltfall's 7. OilRhythm also leads on iOS requirement (15.0 vs 18.0). Boltfall's advantage is update cadence (every 3 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Boltfall sells 7 one-off in-app purchases. OilRhythm asks for nothing beyond the download.

OilRhythm ships an update fortnightly, Boltfall every 3 days. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OilRhythm | Boltfall |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 3 days** |
| Size | 169 MB | 19 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chisato Karakama](https://appshunter.io/developer/6797714696) | [Asgar Amrahov](https://appshunter.io/developer/1783397230) |

## What reviewers say

### OilRhythm

[App page](https://appshunter.io/ios/app/oilrhythm-liquid-timer/id6797714694)

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

**In-app purchases:** none


### Boltfall

[App page](https://appshunter.io/ios/app/boltfall-screw-puzzle-3d/id6802309994)

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter pouch | $1.99 | one-time |
| Starter Bundle | $2.99 | one-time |
| Tool tin | $4.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Parts crate | $9.99 | one-time |
| Pro Bundle | $12.99 | one-time |
| Full pallet | $19.99 | one-time |


## Frequently asked questions

### Is OilRhythm free?

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

### Is Boltfall free?

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

### Do OilRhythm or Boltfall have ads?

Both OilRhythm and Boltfall show ads.

### Which is updated more often, OilRhythm or Boltfall?

OilRhythm ships an update fortnightly, and Boltfall every 3 days. Most recently, OilRhythm was updated on October 7, 2026 and Boltfall on October 24, 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.*