# Optimized Human vs LeibFit

The clearest difference is iOS requirement: Optimized Human at 15.1 against LeibFit's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Optimized Human sells 2 in-app purchases, starting at $19.99 per month and LeibFit sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Optimized Human ships an update fortnightly, LeibFit weekly. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Optimized Human | LeibFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/optimized-human/id6785295451/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 27 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Optimized Human LLC](https://appshunter.io/developer/6785295453) | [Sebastian Leib](https://appshunter.io/developer/6790414791) |

## What reviewers say

### Optimized Human

[App page](https://appshunter.io/ios/app/optimized-human/id6785295451)

Manage peptide protocols with ease. Plan cycles, calculate doses, track injections, and monitor inventory. Syncs across devices and offers free basic tracking with an optional Pro subscription for advanced features.

**Highlights:** Protocol planning with cycling and periodization, Titration support for dose adjustments, Reconstitution calculator for precise dosing, Dose logging with visual injection site tracking, Inventory management with low-stock alerts, Cross-device data synchronization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro — Monthly | $19.99 | per month |
| Pro — Annual | $191.99 | per year |


### LeibFit

[App page](https://appshunter.io/ios/app/leibfit-readiness-and-strength/id6790414789)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LeibFit Pro – Monat | $5.99 | per month |
| LeibFit Pro – Jahr | $39.99 | per year |


## Frequently asked questions

### Is Optimized Human free?

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

### Is LeibFit free?

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

### Do Optimized Human or LeibFit have ads?

Neither Optimized Human nor LeibFit shows ads.

### Which is updated more often, Optimized Human or LeibFit?

Optimized Human ships an update fortnightly, and LeibFit weekly. Most recently, Optimized Human was updated on October 24, 2026 and LeibFit on October 15, 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.*