# Caffeine Tracker vs Whistle

The clearest difference is rating: Caffeine Tracker at 4.9 against Whistle's 4.3. Caffeine Tracker also leads on review sentiment (79% vs 50%) and update cadence (every 5 days vs monthly). Whistle's advantage is device support (3 vs 1) and iOS requirement (18 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Caffeine Tracker sells 4 in-app purchases, starting at $1.99 per month and Whistle sells 5 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Caffeine Tracker holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 41 and 11 respectively. Written reviews point the same way: 79% of Caffeine Tracker's written reviews are positive against 50% of Whistle's.

Caffeine Tracker ships an update every 5 days, Whistle monthly. Both last shipped on November 8, 2026.

## The numbers

| Metric | Caffeine Tracker | Whistle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (41 ratings)](https://appshunter.io/ios/app/caffeine-tracker-alyx/id6473840226/reviews)** | [4.3 (11 ratings)](https://appshunter.io/ios/app/whistle-ai-workout-planner/id6739144449/reviews) |
| Number of ratings | **41** | 11 |
| Positive reviews | **78.9% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 45 MB | 100 MB |
| Requires iOS | 26.0 | **18** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Day Well Spent LLC](https://appshunter.io/developer/1633532884) | [Vogelhaus Apps GmbH](https://appshunter.io/developer/1563696067) |

## What reviewers say

### Caffeine Tracker

[App page](https://appshunter.io/ios/app/caffeine-tracker-alyx/id6473840226)

Log your caffeine intake from various beverages and understand its impact on your sleep and health. Get personalized 'Last Call' times and track trends with detailed charts and AI-powered custom drink analysis.

**Highlights:** Log various caffeine sources, Predict caffeine-free times, Calculate bedtime caffeine levels, Personalized 'Last Call' alarms, Analyze caffeine's impact on sleep, Custom drink creation with AI, Detailed charts and graphs

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Caffeine Club | $1.99 | per month |
| Caffeine Club Annual | $9.99 | per year |
| Caffeine Club Annual | $9.99 | per year |
| Caffeine Club: Lifetime | $24.99 | one-time |


### Whistle

[App page](https://appshunter.io/ios/app/whistle-ai-workout-planner/id6739144449)

This AI-powered app creates personalized training plans for running, cycling, swimming, and strength exercises. It adapts to your schedule and goals, providing insights into your training load, recovery, and progress. Seamlessly integrates with Apple Watch and HealthKit for comprehensive data analysis.

**Highlights:** AI-driven personalized training plans, Adaptive workout adjustments, Progress tracking and insights, Integration with Apple Watch and HealthKit, Weather-aware planning, Privacy-first data handling

**Features:** Apple Watch app

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 1 Month | $4.99 | per month |
| 1 Ultra Month | $9.99 | per month |
| Ultra 3 Months | $24.99 | per 3 months |
| Pro 1 Year | $39.99 | per year |
| Ultra 1 Year | $99.99 | per year |


## Frequently asked questions

### Is Caffeine Tracker free?

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

### Is Whistle free?

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

### Which has better reviews, Caffeine Tracker or Whistle?

Caffeine Tracker is rated higher. Caffeine Tracker averages 4.9 out of 5 from 41 ratings, while Whistle averages 4.3 from 11 ratings.

### Do Caffeine Tracker or Whistle have ads?

Neither Caffeine Tracker nor Whistle shows ads.

### Which is updated more often, Caffeine Tracker or Whistle?

Caffeine Tracker ships an update every 5 days, and Whistle monthly. Most recently, Caffeine Tracker was updated on November 8, 2026 and Whistle on November 8, 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.*