Peek vs Cairn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Peek
See your upcoming calendar events and reminders instantly on your iPhone's Lock Screen or Dynamic Island. This productivity tool unifies your schedule, offering live countdowns and quick editing. Rediscover past moments with the "On This Day" feature and personalize your experience with custom themes.
- Live Activity on Lock Screen & Dynamic Island
- Unified calendar and reminders view
- Keyword search for events and reminders
- "On This Day" feature for past events
- Customizable themes
- Quick event editing
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"What's next?" - That question disappears. Peek is a productivity app that unifies your calendar events and reminders on iPhone. Glance at your Live Activity on the Lock Screen or Dynamic Island, and know what's coming — without opening any app. [Live Activity on Lock Screen & Dynamic Island] Your next event appears on the Lock Screen and Dynamic Island with a live countdown. "Team Standup in 23 min" updates every minute so you always know what's coming. [Calendar + Reminders United] Manage calendars alongside your reminders in one unified view. No more switching between apps. [Home Screen & Lock Screen Widgets] Analog clocks (classic, roman, arabic), calendar views with a heatmap of busy days, a photo widget, memo, D-Day counter, and more. Browse your month at a glance right from your Home Screen. [Landscape Layout] Rotate your iPhone to landscape and Peek automatically switches to a side-by-side layout that makes full use of the wider screen. See today's events and upcoming schedule together at a glance. [Pin & Drag-and-Drop] Pin important events to the top so they never get lost. Drag and drop events and reminders onto another date to reschedule them instantly. [Search] Quickly find past and upcoming events and reminders by keyword. Results are grouped by date so you can instantly locate what you need. [On This Day] Look back at what happened on the same day in previous years. Revisit past events and reminders to rediscover forgotten memories. [Various Themes] Choose from a variety of built-in themes, or create your own custom theme. Mix colors, gradients, and styles to express your unique personality. [Quick Event Editing] Edit events and reminders directly in the app. Change titles, times, and notes in a familiar Calendar-style editor. All changes are saved automatically. Privacy: All data stays on your device.
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: Peek at none against Cairn's shown. Cairn's advantage is iOS requirement (15.0 vs 18.0). On price, update cadence, 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. Peek 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.
Peek ships an update weekly, Cairn every 5 days. The most recent releases landed on October 25, 2026 and October 12, 2026 respectively.
| Parameter | Peek | Cairn |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Weekly | Every 5 days — better |
| 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 | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | dasol kim | Heajung Yoo |
In-app purchases
Peek
- Timi Premium$2.99
Cairn
- Cairn Pro Monthly$1.991 Month
- Cairn Pro yearly$12.991 Year
- Cairn Pro - Ad-free forever$0.99









