Simple Habits! vs Cairn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Add/remove entries with a tap
- Add notes to entries
- Track current streaks
- Track longest streaks
- Simple habit building
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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
Cairn
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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
Verdict
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
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.
| Parameter | Simple Habits! | Cairn |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Every 5 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPod, Apple Watch — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | The Binary Kitchen, LLC | Heajung Yoo |
In-app purchases
Simple Habits!
- Habits Pro$3.99
Cairn
- Cairn Pro Monthly$1.991 Month
- Cairn Pro yearly$12.991 Year
- Cairn Pro - Ad-free forever$0.99









