Jet Log vs Cairn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jet Log
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Jet Log is a tag-based time tracker you can run straight from your Home Screen widget. No need to open the app—just tap a tag on the widget to start or stop tracking, and record how you spend your time with zero friction. ■ Operate right from the widget Pick a tag and start, pause, or stop tracking—all on the Home Screen widget. Switch tabs inside the widget to check your records, weekly chart, and pie chart on the spot. ■ Organize with tags Sort your time with your own tags—Work, Study, Exercise, and more—each with a color and icon. See at a glance where your time goes. ■ Visualize your stats View weekly totals as a line or bar chart, and the breakdown for each period (today / this week / all time) as a pie chart. Per-tag breakdowns and a daily-average line are included too. ■ Sync across iPhone, Mac & Apple Watch Sign in with the same account and your tags, records, and settings sync automatically across every device. You can even start, stop, and review tracking entirely from your Apple Watch. ■ Manual entry & editing Add time manually after the fact, or edit and delete past records anytime. ■ Made to feel good - Customize the accent color and Light / Dark theme - Ambient background sound (BGM) to help you focus while tracking (iPhone / Mac) - No ads, no subscriptions For anyone who wants to rethink how they spend their time, or who's looking for a fast, simple time tracker. Start making your time visible today with Jet Log. Privacy Policy: https://ryoheihoriuchi0000.github.io/jetlog-privacy-en.md EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: See "Settings > Terms of Service" inside the app
Cairn
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Focus that leaves something behind.Cairn is a calm Pomodoro and deep-work timer. Finish a focus session and it forges a small, one-of-a-kind keepsake — a piece of generative art that's yours to keep, forever.No streaks to guilt you. No trees that die. No ads, no subscription, no tracking. Buy it once.Plant a focus. Grow a garden of your work.Every completed session blooms into a unique keepsake and joins your terrarium — a quiet, growing record of the time you gave your attention. Each one is deterministic and permanent: the same focus always grows the same object, and it never withers.Why Cairn feels different• A keepsake, not a chore. Reward without the gamified guilt — nothing dies if you stop.• Buy once, keep forever. One purchase unlocks everything. No subscription, ever.• Private by design. 100% on-device. No account, no ads, no tracking, works offline.• Calm, not hustle. Built for deep work, study, and reading — not dopamine loops.Everything you'd want in a focus timer• Pomodoro and custom-length sessions for study, work, and reading• A living garden/terrarium of everything you've grown• A diary calendar and honest stats — hours, rhythm, materials• Home & Lock Screen widgets, Live Activity & Dynamic Island, Control Center• Apple Watch app with complications — start a focus from your wrist• Full iPhone + iPad, light & dark, and accessibility supportCairn Pro — one purchase, foreverUnlock every material, palette, and the full garden with a single buy-once purchase. No subscriptions, no upsells.Focus is fleeting. What you make of it doesn't have to be.
Screenshots
Verdict
The clearest difference is price: Cairn at Free against Jet Log's $5.99. Cairn also leads on ads (none vs shown). Jet Log's advantage is iOS requirement (17.0 vs 26.0). On 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
Cairn is free to download; Jet Log costs $5.99 up front. Jet Log sells 4 in-app purchases, starting at $1.99 per month and Cairn sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Jet Log | Cairn |
|---|---|---|
| Price | $5.99 | Free — better |
| Update frequency | Every 5 days | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 79 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryohei Horiuchi | Pham Van Hai |
In-app purchases
Jet Log
- Jet Log Plus Monthly$1.991 Month
- Jet Log Plus Yearly7 Days trial$9.991 Year
- Support the Developer$1.99
- Lifetime$29.99
Cairn
- Cairn Pro · Lifetime Unlock$1.99





