# Caffeine Curve vs Halvo

The clearest difference is in-app purchases: Caffeine Curve at none against Halvo's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Halvo sells 2 in-app purchases, starting at $3.99 per month. Caffeine Curve asks for nothing beyond the download.

Caffeine Curve ships an update fortnightly, Halvo monthly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Caffeine Curve | Halvo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/caffeine-curve/id6760567892/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free | — |
| Size | 4 MB | 8 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Haris Delalic](https://appshunter.io/developer/1885039771) | [Jan Niklas Molleken](https://appshunter.io/developer/6775926231) |

## What reviewers say

### Caffeine Curve

[App page](https://appshunter.io/ios/app/caffeine-curve/id6760567892)

This app estimates your current caffeine level in real-time by analyzing dietary caffeine entries from Apple Health. It helps you understand how caffeine affects your body throughout the day, aiding decisions about intake and sleep. The interface is designed for quick, clear information.

**Highlights:** Real-time caffeine level tracking, Caffeine absorption and elimination model, Apple Health integration, Lock Screen widget and Home Screen Widgets, Peak and sleep indicators, Personalized sensitivity profiles, Demo mode for exploration

**Features:** macOS Compatibility

**In-app purchases:** none


### Halvo

[App page](https://appshunter.io/ios/app/halvo-caffeine-tracker/id6775926229)

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Halvo Pro – Monthly | $3.99 | per month |
| Halvo Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Caffeine Curve free?

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

### Is Halvo free?

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

### Do Caffeine Curve or Halvo have ads?

Neither Caffeine Curve nor Halvo shows ads.

### Which is updated more often, Caffeine Curve or Halvo?

Caffeine Curve ships an update fortnightly, and Halvo monthly. Most recently, Caffeine Curve was updated on November 5, 2026 and Halvo on November 5, 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.*