# ERHA.DNA vs Optimized Strength Training

The clearest difference is update cadence: ERHA.DNA at every 3 weeks against Optimized Strength Training's every 6 weeks. ERHA.DNA also leads on iOS requirement (9.0 vs 15.5). Optimized Strength Training's advantage is ratings volume (5 vs 1) and device support (4 vs 2). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for ERHA.DNA against 5.0 for Optimized Strength Training. That said, the two scores are not equally well evidenced: Optimized Strength Training has 5 ratings behind it against 1, so its average is the more settled of the two.

ERHA.DNA ships an update every 3 weeks, Optimized Strength Training every 6 weeks. The most recent releases landed on October 5, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | ERHA.DNA | Optimized Strength Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/erhadna/id1479022105/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/optimized-strength-training/id6456571995/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 48 MB | 193 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Erha](https://appshunter.io/developer/1496308914) | [Optimized Strength Training LLC](https://appshunter.io/developer/1700524725) |

## What reviewers say

### ERHA.DNA

[App page](https://appshunter.io/ios/app/erhadna/id1479022105)

This app uses AI to analyze your skin data and recommend a personalized skincare line. It combines a smart assistant with a physical test kit to create safe and effective treatments tailored to your unique needs.

**Highlights:** AI-powered skin data processing, Physical skin measurement test kit, Personalized skincare line recommendations, Safe and effective treatments, Smart Assistant functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Optimized Strength Training

[App page](https://appshunter.io/ios/app/optimized-strength-training/id6456571995)

Achieve your fitness goals with personalized workout programs, exercise videos, and nutrition tracking. Set goals, earn badges, and connect with a supportive community. Seamlessly track progress with wearable device integrations.

**Highlights:** Personalized workout programs, Exercise demonstration videos, Nutrition tracking, Goal setting and progress tracking, Real-time coach communication, Community forums, Body measurement tracking, Wearable device integration

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is ERHA.DNA free?

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

### Is Optimized Strength Training free?

Optimized Strength Training is free to download, with no in-app purchases.

### Which has better reviews, ERHA.DNA or Optimized Strength Training?

ERHA.DNA and Optimized Strength Training are both rated 5.0 out of 5 on the App Store, from 1 and 5 ratings respectively.

### Do ERHA.DNA or Optimized Strength Training have ads?

Neither ERHA.DNA nor Optimized Strength Training shows ads.

### Which is updated more often, ERHA.DNA or Optimized Strength Training?

ERHA.DNA ships an update every 3 weeks, and Optimized Strength Training every 6 weeks. Most recently, ERHA.DNA was updated on October 5, 2026 and Optimized Strength Training on September 29, 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.*