# Sleep Time+ Cycle Alarm Clock vs Caffeine App

The clearest difference is monetization model: Caffeine App at free with in-app purchases against Sleep Time+ Cycle Alarm Clock's subscription. Caffeine App also leads on ads (none vs shown) and device support (3 vs 1). Sleep Time+ Cycle Alarm Clock's advantage is ratings volume (2.5K vs 342) and iOS requirement (16.0 vs 18.0). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Sleep Time+ Cycle Alarm Clock sells 8 in-app purchases, starting at $4.99 per month and Caffeine App sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Sleep Time+ Cycle Alarm Clock against 4.6 for Caffeine App. That said, the two scores are not equally well evidenced: Sleep Time+ Cycle Alarm Clock has 2.5K ratings behind it against 342, so its average is the more settled of the two. Written reviews are what separate them: 69% of Sleep Time+ Cycle Alarm Clock's written reviews are positive against 74% of Caffeine App's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 10, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Sleep Time+ Cycle Alarm Clock | Caffeine App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.5K ratings)](https://appshunter.io/ios/app/sleep-time-plus-cycle-alarm-clock/id498360026/reviews)** | [4.6 (342 ratings)](https://appshunter.io/ios/app/caffeine-app-daily-tracker/id1045959983/reviews) |
| Number of ratings | **2.5K** | 342 |
| Positive reviews | 68.8% of reviews | **73.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 185 MB | 20 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Azumio Inc.](https://appshunter.io/developer/439290207) | [Oleg Mueller](https://appshunter.io/developer/367875607) |

## What reviewers say

### Sleep Time+ Cycle Alarm Clock

[App page](https://appshunter.io/ios/app/sleep-time-plus-cycle-alarm-clock/id498360026)

Understand your sleep patterns and wake up feeling refreshed. This app tracks sleep cycles, offers soothing soundscapes for falling asleep, and measures resting heart rate without wearables. It provides detailed analysis and customizable alarms to optimize your sleep and wake-up experience.

**Highlights:** Sleep cycle analysis, Soothing soundscapes, Resting heart rate measurement, Smart alarm clock, Detailed sleep graphs, Apple Health integration

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |
| Premium | $8.99 | per month |
| Premium | $9.99 | per month |
| Premium | $9.99 | per month |
| Premium | $19.99 | per 3 months |
| Premium | $29.99 | per year |
| Premium | $29.99 | per year |
| Premium | $46.99 | per year |

**What reviewers like**

- 🚀 Helps track sleep patterns
- 👍 Gentle alarm wakes you up
- 🌊 Soundscapes help fall asleep
- 💤 Provides sleep quality insights

**What reviewers complain about**

- 🐛 Alarm issues (fails to go off, resets unexpectedly)
- 🔋 Battery drain
- 💰 Paywall for core features
- 🤖 Inaccurate sleep tracking

**Reported bugs**

- Crashes on startup
- Freezing issues
- Inconsistent alarm behavior
- Lost sleep data after updates

**Requested features**

- Heart rate monitoring integration
- Sleep data export and analysis
- Apple Watch companion app
- More customization options


### 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


## Frequently asked questions

### Is Sleep Time+ Cycle Alarm Clock free?

Sleep Time+ Cycle Alarm Clock is free to download, with in-app purchases available.

### Is Caffeine App free?

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

### Which has better reviews, Sleep Time+ Cycle Alarm Clock or Caffeine App?

Sleep Time+ Cycle Alarm Clock is rated higher. Sleep Time+ Cycle Alarm Clock averages 4.8 out of 5 from 2.5K ratings, while Caffeine App averages 4.6 from 342 ratings.

### Do Sleep Time+ Cycle Alarm Clock or Caffeine App have ads?

Sleep Time+ Cycle Alarm Clock shows ads; Caffeine App does not.

### Which is updated more often, Sleep Time+ Cycle Alarm Clock or Caffeine App?

Sleep Time+ Cycle Alarm Clock ships an update monthly, and Caffeine App monthly. Most recently, Sleep Time+ Cycle Alarm Clock was updated on November 10, 2026 and Caffeine App on November 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*