# StackProof vs Caffinity

The clearest difference is in-app purchases: Caffinity at none against StackProof's 3. StackProof's advantage is update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. StackProof sells 3 in-app purchases, starting at $1.99 per month. Caffinity asks for nothing beyond the download.

StackProof ships an update weekly, Caffinity every 2 months. Both last shipped on November 5, 2026.

## The numbers

| Metric | StackProof | Caffinity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Size | 42 MB | 60 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [joel Saucedo Lozano](https://appshunter.io/developer/1895885764) | [Muhammad Atif](https://appshunter.io/developer/1893629394) |

## What reviewers say

### StackProof

[App page](https://appshunter.io/ios/app/stackproof-supplement-tracker/id6764703324)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $34.99 | per year |
| Lifetime | $59.99 | one-time |


### Caffinity

[App page](https://appshunter.io/ios/app/caffinity-caffeine-tracker/id6770263224)

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

**In-app purchases:** none


## Frequently asked questions

### Is StackProof free?

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

### Is Caffinity free?

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

### Do StackProof or Caffinity have ads?

Neither StackProof nor Caffinity shows ads.

### Which is updated more often, StackProof or Caffinity?

StackProof ships an update weekly, and Caffinity every 2 months. Most recently, StackProof was updated on November 5, 2026 and Caffinity 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.*