# Heavier vs Duo

The clearest difference is update cadence: Duo at every 2 days against Heavier's every 4 days. On price, ads, in-app purchases and device support there is nothing between them.

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

Heavier ships an update every 4 days, Duo every 2 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Heavier | Duo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (13 ratings)](https://appshunter.io/ios/app/heavier/id1543576981/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Free | — |
| Size | 34 MB | 13 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Strategic Information Services](https://appshunter.io/developer/1543576983) | [Ruud Slagers](https://appshunter.io/developer/1873281390) |

## What reviewers say

### Heavier

[App page](https://appshunter.io/ios/app/heavier/id1543576981)

This AI-powered strength training app analyzes your workout data to provide insights on progress and areas for improvement. It offers a daily AI coach with workout plans and allows for hands-free logging via voice commands.

**Highlights:** AI-assisted strength training, Progressive overload tracking, Workout volume, frequency, and balance analysis, Daily AI coach and workout plans, Voice-activated lift logging, Hands-free operation

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

**In-app purchases:** none


### Duo

[App page](https://appshunter.io/ios/app/duo-75-hard-challenge/id6819230205)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Heavier free?

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

### Is Duo free?

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

### Do Heavier or Duo have ads?

Neither Heavier nor Duo shows ads.

### Which is updated more often, Heavier or Duo?

Heavier ships an update every 4 days, and Duo every 2 days. Most recently, Heavier was updated on November 3, 2026 and Duo on November 6, 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.*