Comparison

Simple Habits! vs Cairn

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

Head to head
About

Simple Habits!

Easily build positive habits with a simple tap interface. Track your progress with current and longest streaks, and add notes to each entry for personalized reflection. This app helps you stay motivated on your journey to self-improvement.

Highlights
  • Add/remove entries with a tap
  • Add notes to entries
  • Track current streaks
  • Track longest streaks
  • Simple habit building
Features
Read full description

Build habits one day at a time: - Add or remove an entry with a tap - Add a note to each entry - Tracks current and longest streaks

About

Cairn

Features
Read full description

Cairn (차곡차곡) is a calm, anonymous-first todo app — every core feature works without an account. Like the small stones stacked into a cairn on a quiet trail, line up today's tasks one by one with clarity. ■ Core features - Anonymous by default: no sign-up, no transmission. All data stays on your device. - Inline markers: type @, #, !, * to set date, time, importance, and repeat in one line. e.g. "@tomorrow #3pm meeting", "*every-monday run". - Two-way swipe: left for reschedule / favorite / repeat. Right for duplicate / move group / delete. - Groups and color labels: organize by work, personal, fitness — at a glance. - Notifications with quiet hours: push reminders that auto-defer to the next morning during quiet hours. - Stats dashboard: weekly / monthly / yearly completion, 14-day sparkline, average completion time. - Backup & restore: JSON / CSV / Markdown export and import. Move devices safely. - Dark mode and three themes (Tica, Tally, Nudge). - English / Korean auto-detected. ■ Tracks - Anonymous (default): full core, on-device only. - Pro: ad-free — one-time purchase, yours forever. ■ What we don't collect No location, contacts, photos, microphone, camera, or health data. In anonymous mode, not a single byte leaves your device. ■ About Sobok — building small tools that add quiet order to daily life. Contact: admin@sobok.kr Privacy / Terms: https://sobok.kr/carin/legal/terms

Screenshots

Simple Habits!3 screens
Cairn4 screens

Verdict

The call

The clearest difference is ads: Simple Habits! at none against Cairn's shown. Cairn's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Habits! sells 1 one-off in-app purchase and Cairn sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 7 level
Simple Habits! versus Cairn: the parameters behind the verdict, then further details
ParameterSimple Habits!Cairn
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequency—Every 5 days
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod, Apple Watch — better
Requires iOS17.015.0 — better
Further details — not scored
Size2 MB41 MB
Age rating4+4+
DeveloperThe Binary Kitchen, LLCHeajung Yoo

In-app purchases

1 purchases

Simple Habits!

One-time1
  • Habits Pro$3.99
3 purchases

Cairn

Subscriptions2
  • Cairn Pro Monthly$1.991 Month
  • Cairn Pro yearly$12.991 Year
One-time1
  • Cairn Pro - Ad-free forever$0.99

Questions

Is Simple Habits! free?
Simple Habits! is free to download, with in-app purchases available.
Is Cairn free?
Cairn is free to download, with in-app purchases available.
Do Simple Habits! or Cairn have ads?
Cairn shows ads; Simple Habits! does not.

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