# Caffeine Clock vs GhostDelta

The clearest difference is iOS requirement: Caffeine Clock at 16.4 against GhostDelta's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Caffeine Clock sells 2 one-off in-app purchases and GhostDelta sells 2 in-app purchases, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.

Caffeine Clock ships an update weekly, GhostDelta every 8 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Caffeine Clock | GhostDelta |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (28 ratings)](https://appshunter.io/ios/app/caffeine-clock-track-caffeine/id6504160396/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Free | — |
| Size | 121 MB | 42 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ANTONIN WINGENDER](https://appshunter.io/developer/1751178342) | [Jaisah Webb](https://appshunter.io/developer/1843574441) |

## What reviewers say

### Caffeine Clock

[App page](https://appshunter.io/ios/app/caffeine-clock-track-caffeine/id6504160396)

This app helps you track your caffeine intake and understand its impact on your sleep. It models caffeine absorption and half-life to provide a clear view of your current and projected levels, allowing you to plan your consumption for better rest.

**Highlights:** Caffeine absorption and half-life modeling, Real-time caffeine level tracking, Interactive home screen widgets, Sleep-aware insights and bedtime planning, Extensive drink database with custom options, Daily caffeine threshold alerts

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $4.99 | one-time |
| Remove Ads | $9.99 | one-time |


### GhostDelta

[App page](https://appshunter.io/ios/app/ghostdelta/id6760996455)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GhostDelta - Yearly | $2.99 | per year |
| Lifetime Access | $7.99 | one-time |


## Frequently asked questions

### Is Caffeine Clock free?

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

### Is GhostDelta free?

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

### Do Caffeine Clock or GhostDelta have ads?

Neither Caffeine Clock nor GhostDelta shows ads.

### Which is updated more often, Caffeine Clock or GhostDelta?

Caffeine Clock ships an update weekly, and GhostDelta every 8 days. Most recently, Caffeine Clock was updated on October 24, 2026 and GhostDelta on October 31, 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.*