# Caffeine App vs Caffeine Flow

The clearest difference is in-app purchases: Caffeine Flow at none against Caffeine App's 1. Caffeine Flow also leads on update cadence (fortnightly vs monthly) and iOS requirement (15.0 vs 18.0). Caffeine App's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Caffeine App sells 1 one-off in-app purchase. Caffeine Flow asks for nothing beyond the download.

Caffeine App ships an update monthly, Caffeine Flow fortnightly. The most recent releases landed on October 15, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Caffeine App | Caffeine Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (340 ratings)](https://appshunter.io/ios/app/caffeine-app-daily-tracker/id1045959983/reviews)** | — |
| Number of ratings | **340** | — |
| Positive reviews | 73.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 86 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | **iPhone, Apple Watch, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Mueller](https://appshunter.io/developer/367875607) | [Chinipy](https://appshunter.io/developer/1829955713) |

## What reviewers say

### Caffeine App

[App page](https://appshunter.io/ios/app/caffeine-app-daily-tracker/id1045959983)

Track your caffeine intake from various beverages and monitor your hydration levels. Visualize your caffeine curve over 24 hours and receive notifications for your optimal sleep time. Integrates with Apple Health and Apple Watch for seamless logging and data syncing.

**Highlights:** Log caffeine from coffee, tea, and energy drinks, Visualize 24-hour caffeine curve, Calculate optimal sleep time, Track daily water intake, Apple Watch logging and complications, Apple Health integration, iCloud sync

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use and intuitive interface
- 🎯 Accurate caffeine tracking and decay calculations
- ⏰ Helpful sleep readiness predictions
- 🏥 Apple Health integration for long-term tracking
- ⌚ Apple Watch support with quick logging

**What reviewers complain about**

- ⚠️ Recent performance degradation from new features
- 📊 Graphs become too small with multiple charts enabled
- ⏳ Long graphics update delays affecting responsiveness
- 🐛 Sleep ready time shows current time instead of prediction
- 🌍 Limited beverage library for non-German markets

**Reported bugs**

- Sleep ready time displays current time instead of predicted sleep time
- Cannot rename custom amounts until after adding them
- Newly added custom amounts appear at bottom of list
- Health app data from third-party apps not syncing
- All presets missing in some versions

**Requested features**

- Toggle option to disable bar chart visualization
- Taller graph display area with scrolling capability
- Personalization based on body weight and metabolism
- Ounce-based measurement options for drinks
- Multi-day and historical trend analysis


### 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 Caffeine App free?

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

### Is Caffeine Flow free?

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

### Do Caffeine App or Caffeine Flow have ads?

Caffeine Flow shows ads; Caffeine App does not.

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

Caffeine App ships an update monthly, and Caffeine Flow fortnightly. Most recently, Caffeine App was updated on October 15, 2026 and Caffeine Flow on September 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.*