# MustDuo vs Pibu

The clearest difference is monetization model: MustDuo at free against Pibu's freemium. Pibu's advantage is iOS requirement (15.5 vs 18.5). On price, rating, review sentiment and ratings volume 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 MustDuo against 5.0 for Pibu. Both are backed by a comparable volume of ratings — 17 and 9 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

MustDuo ships an update fortnightly, Pibu every 3 weeks. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | MustDuo | Pibu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (17 ratings)](https://appshunter.io/ios/app/mustduo/id6749694909/reviews) | [5.0 (9 ratings)](https://appshunter.io/ios/app/pibu/id6772330792/reviews) |
| Number of ratings | **17** | 9 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Freemium |
| Size | 59 MB | 78 MB |
| Requires iOS | 18.5 | **15.5** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [MustDuo](https://appshunter.io/developer/1831771141) | [Deepak Karani](https://appshunter.io/developer/6772330794) |

## What reviewers say

### MustDuo

[App page](https://appshunter.io/ios/app/mustduo/id6749694909)

This fitness app helps you build consistency and achieve your goals with real-time tracking and personalized plans. An AI coach provides guidance, motivation, and on-the-fly adjustments to keep you on track with your fitness journey.

**Highlights:** Smart workout tracking, Personalized workout plans, AI fitness coach, Habit building features, Gamified fitness experience, Progress analytics

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

**In-app purchases:** none


### Pibu

[App page](https://appshunter.io/ios/app/pibu/id6772330792)

This app analyzes your skin using AI from a selfie to create a personalized morning and evening skincare routine. It tracks your skin score over time and offers a private space for your skincare journey. Premium features unlock full analysis and product integration.

**Highlights:** AI-powered cosmetic skin scan, Personalized daily skincare routines, Skin score and progress tracking, Private on-device photo history, AI companion for skincare questions, Shareable progress cards

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

**In-app purchases:** none


## Frequently asked questions

### Is MustDuo free?

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

### Is Pibu free?

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

### Which has better reviews, MustDuo or Pibu?

MustDuo and Pibu are both rated 5.0 out of 5 on the App Store, from 17 and 9 ratings respectively.

### Do MustDuo or Pibu have ads?

Neither MustDuo nor Pibu shows ads.

### Which is updated more often, MustDuo or Pibu?

MustDuo ships an update fortnightly, and Pibu every 3 weeks. Most recently, MustDuo was updated on October 24, 2026 and Pibu on October 10, 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.*