Comparison

Mass vs Cairn

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Mass

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
Read full description

Mass is a clean, focused strength training app designed to make workout tracking simple and consistent. Log sets quickly, track weight and reps, and follow your workouts with a simple flow that stays out of your way. With Mass you can: - Create and organize custom workouts - Log reps, weight, and notes for every set - View plate math for barbell lifts - Add warm-up set suggestions based on your working weight - Track weekly training volume and workout consistency - Review your session history and progress over time Built for beginners and experienced lifters alike, Mass keeps workout tracking straightforward and reliable so you can stay consistent and keep getting stronger. Privacy Policy: https://runarhummelsund.dev/projects/mass Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Cairn

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
Read full description

Cairn is a private journal that lives entirely on your phone. No account. No cloud. No tracking. Everything you write โ€” and everything Cairn notices about it โ€” stays on your device. WRITE HOWEVER YOU WANT Type it, speak it, or scan a handwritten page. Cairn turns voice notes and photos of your notebook into entries, all processed on-device. Your audio and images never leave your phone. NOT SURE WHERE TO START Tap "Help me journal" and Cairn asks one gentle question at a time, helping you find the words โ€” then keeps them as your entry. EVERY ENTRY IS A STONE Over days and weeks, your entries stack into a cairn โ€” a quiet marker of the road you've walked. Cairn reflects your moods, your recurring themes, and the patterns you might not notice yourself: a Trail of your days, a Mood Map, a feel for your Terrain. GENTLE WHEN IT COUNTS Cairn reflects, it doesn't diagnose. No labels, no scores pretending to be clinical truth. On the hard days, it sets the analysis aside and simply makes room. PRIVATE BY DESIGN - Fully on-device โ€” works offline, no sign-up - Nothing is uploaded, shared, or sold - Lock your journal behind Face ID WHAT IT COSTS Cairn is free to download, and everything is open for your first 14 days. After that, a single purchase unlocks Cairn permanently โ€” one payment, no subscription, now or ever. If you don't buy it, nothing you wrote is taken away: your entries stay readable, searchable and exportable for as long as you keep the app. The unlock is for what comes next โ€” new entries, reflection, and the patterns Cairn draws from your writing. Bought Cairn before it went free? It stays unlocked. You'll never be asked to pay again. Journal. Reflect. Grow.

Screenshots

Mass4 screens
Cairn4 screens

Verdict

The call

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.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences ยท 5 level
Mass versus Cairn: the parameters behind the verdict, then further details
ParameterMassCairn
Price$0.99Free โ€” better
Positive reviews0.0% of reviews100.0% of reviews โ€” better
Update frequencyEvery 6 days โ€” betterEvery 10 days
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFreemium โ€” better
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.126.0 โ€” better
Further details โ€” not scored
Size15 MB4 MB
Age rating4+12+
DeveloperRunar HummelsundRobin Fitzpatrick

Customer experience

Mass

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Cairn

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Mass

No in-app purchases

None

Cairn

No in-app purchases

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.

Other comparisons