# 더트레일 vs Caffeine Flow

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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

더트레일 ships an update every 6 days, Caffeine Flow fortnightly. Both last shipped on October 25, 2026.

## The numbers

| Metric | 더트레일 | Caffeine Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Fortnightly |
| Size | 175 MB | 86 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [시터스](https://appshunter.io/developer/1802555152) | [Chinipy](https://appshunter.io/developer/1829955713) |

## What reviewers say

### 더트레일

[App page](https://appshunter.io/ios/app/id6749554319)

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

**In-app purchases:** none


### Caffeine Flow

[App page](https://appshunter.io/ios/app/caffeine-flow-sleep-tracker/id6759970536)

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

**In-app purchases:** none


## Frequently asked questions

### Is 더트레일 free?

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

### Is Caffeine Flow free?

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

### Do 더트레일 or Caffeine Flow have ads?

Caffeine Flow shows ads; 더트레일 does not.

### Which is updated more often, 더트레일 or Caffeine Flow?

더트레일 ships an update every 6 days, and Caffeine Flow fortnightly. Most recently, 더트레일 was updated on October 25, 2026 and Caffeine Flow 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.*