# Mass vs Cairn

The clearest difference is review sentiment: Cairn at 100% against Mass's 0%. Cairn also leads on price (Free vs $0.99). On update cadence, ads, in-app purchases and device support there is nothing between them.

Cairn is free to download; Mass costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mass ships an update every 6 days, Cairn every 10 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Mass | Cairn |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 10 days |
| Monetization | Paid | **Freemium** |
| Size | 15 MB | 4 MB |
| Requires iOS | 26.1 | **26.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Runar Hummelsund](https://appshunter.io/developer/1143920863) | [Robin Fitzpatrick](https://appshunter.io/developer/6786061217) |

## What reviewers say

### Mass

[App page](https://appshunter.io/ios/app/mass-workout-tracker/id6739637482)

This app simplifies strength training by allowing users to quickly log sets, track weight and reps, and monitor workout consistency. It offers features like custom workout creation, warm-up suggestions, and progress review, making it ideal for consistent strength building.

**Highlights:** Create custom workouts, Log reps and weight, Track weekly volume, View plate math, Add warm-up suggestions, Review session history

**Features:** macOS Compatibility

**In-app purchases:** none


### Cairn

[App page](https://appshunter.io/ios/app/cairn-journal-and-mood-tracker/id6786061215)

This private journal app stays entirely on your device, offering AI-powered reflection and mood tracking. Write, speak, or scan handwritten notes, and gain insights into your patterns without any data leaving your phone. It's designed for gentle self-discovery and personal growth.

**Highlights:** On-device journaling, AI-powered reflection prompts, Mood and theme pattern analysis, Voice and handwriting input, Offline functionality, Face ID lock

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mass free?

Mass costs $0.99, with no in-app purchases.

### Is Cairn free?

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

### Do Mass or Cairn have ads?

Neither Mass nor Cairn shows ads.

### Which is updated more often, Mass or Cairn?

Mass ships an update every 6 days, and Cairn every 10 days. Most recently, Mass was updated on November 4, 2026 and Cairn on October 31, 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.*