# Dopamine Protocol vs Caleb

The clearest difference is in-app purchases: Dopamine Protocol at none against Caleb's 2. Caleb's advantage is update cadence (weekly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Caleb sells 2 in-app purchases, starting at $9.99 per month. Dopamine Protocol asks for nothing beyond the download.

Dopamine Protocol ships an update every 4 months, Caleb weekly. The most recent releases landed on September 13, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Dopamine Protocol | Caleb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caleb-strength-coach/id6778228185/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 65 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Caleb Hartley](https://appshunter.io/developer/1087195107) | [Fredys Martinez](https://appshunter.io/developer/6778228187) |

## What reviewers say

### Dopamine Protocol

[App page](https://appshunter.io/ios/app/dopamine-protocol/id6477759682)

**Features:** macOS Compatibility

**In-app purchases:** none


### Caleb

[App page](https://appshunter.io/ios/app/caleb-strength-coach/id6778228185)

This app acts as a personalized strength coach, adapting workouts to your equipment, schedule, injuries, and goals. It provides daily missions and debriefs, remembering your progress to offer honest, specific guidance without hype or generic advice.

**Highlights:** Personalized workout plans, Adapts to equipment and schedule, Remembers past performance, Daily mission and debrief system, Honest and specific feedback, Focus on long-term capability

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Annual | $99.99 | per year |


## Frequently asked questions

### Is Dopamine Protocol free?

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

### Is Caleb free?

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

### Do Dopamine Protocol or Caleb have ads?

Neither Dopamine Protocol nor Caleb shows ads.

### Which is updated more often, Dopamine Protocol or Caleb?

Dopamine Protocol ships an update every 4 months, and Caleb weekly. Most recently, Dopamine Protocol was updated on September 13, 2026 and Caleb on September 20, 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.*