Comparison

Dooo vs Syn9

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

Head to head
About

Dooo

Build positive habits effortlessly with this intuitive tracker. Customize goals, view progress with detailed statistics, and stay organized with a to-do list. Syncs across devices and offers a focus mode for enhanced productivity.

Highlights
  • Customizable habit names, icons, and colors
  • Flexible goal setting with multiple check-in frequencies
  • Detailed statistics and check-in calendar
  • To-Do List functionality
  • Focus mode
  • iCloud backup and cross-device sync
  • Data export
Features
Read full description

easy-to-use habit tracking app to help you build good habits effortlessly. Tap to check in, long press to undo—it's that simple ▣ Fully Functional - Customize habit names, icons, and colors - Multiple check-in frequencies (daily, weekly, monthly) - Flexible goal setting - Detailed statistics and check-in records - Focus mode - To-Do List - Check-in calendar for easy daily progress viewing - Habit archiving, sorting, and management features - Custom check-in reminders - iCloud backup and real-time data sync across devices - Data export - Dark mode support - Achievement sharing ▣ Multi-Platform Support - Deeply optimized for iOS 26 - Perfect iPad large screen experience - Apple Watch support - Supports live activity, interactive widget, and lock screen widget ▣ Contact Us ◎ Email: daak.user@outlook.com # Dooo Subscription Dooo subscription allows you to unlock all paid features in Dooo - Payment will be charged to iTunes account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified - Subscriptions can be managed by users. You can manage or cancel automatic renewal in your account settings - If a free trial period is offered, any unused portion will be forfeited when the user purchases a subscription to that publication (if applicable) Terms Of Use: https://daak.gitbook.io/dooo/terms-of-use Privacy Policy: https://daak.gitbook.io/dooo/privacy-policy

About

Syn9

Features
Read full description

Every memory starts with a plan. Syn9 lets you make plans, share them, and keep the photos — with family and friends. Choose who sees each schedule and note: family plans for family, weekend plans for friends. Schedules Choose who to share each event with — family schedules for family, friend plans for friends. Each event gets its own chat so you can coordinate without losing context. Reminders and recurring events keep nothing slipping through. Notes Share shopping lists, trip plans, and more — with whoever you choose. Edit lists together in real time so no one's grocery list is out of sync. Lock a note to require Face ID or your passcode before it opens on your device. Chat Tap any schedule or note to open its chat — never lose the thread. Group with friends-of-friends without exchanging contacts. Reactions, pins, and unread badges keep things organized. Albums Create an album from any schedule, note, or chat, and collect everyone's photos and videos in one place. The plan becomes a memory you can look back on. Friends Add friends easily via QR code or a shareable link. Set your go-to share list in advance to save time every time. Push Notifications Get notified instantly when a schedule, note, or message is shared with you. Never miss what matters. Koe (AI assistant) - Say "dinner tomorrow at 7" — Koe creates the schedule - "Share with my crew" — Koe knows your friends, groups, and the nicknames you use - Ask anything — Koe searches the web too Make everyday life with family and friends smoother and more fun. Give Syn9 a try. Some features require a Syn9 Plus or Max subscription: photo and video attachments, albums, recurring events, reminders, default share lists, note folders, note lock, and monthly Koe usage. Terms of Use & Privacy Policy: https://syn9.jp/en/terms-of-service https://syn9.jp/en/privacy-policy

Screenshots

Dooo4 screens
Syn94 screens

Verdict

The call

The clearest difference is device support: Dooo at 3 against Syn9's 1. On price, update cadence, ads and in-app purchases 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. Dooo sells 2 in-app purchases, starting at $0.99 per year and Syn9 sells 6 in-app purchases, starting at $3.00 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Dooo ships an update every 3 days, Syn9 every 5 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

Scorecard1 real difference · 9 level
Dooo versus Syn9: the parameters behind the verdict, then further details
ParameterDoooSyn9
PriceFreeFree
Rating4.5 (2 ratings) — better—
Positive reviews81.8% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.018.0
Further details — not scored
Size17 MB57 MB
Age rating4+4+
DeveloperLovely Duck, LLCTomohiro Sekikawa

In-app purchases

2 purchases

Dooo

Subscriptions1
  • Annual Subscription$0.991 Year
One-time1
  • One-Time Purchase$2.99
6 purchases

Syn9

Subscriptions3
  • Plus$3.001 Month
  • Max$6.991 Month
  • Plus annual$29.001 Year
One-time3
  • Light size$1.99
  • Regular size$3.99
  • Generous size$7.99

Questions

Is Dooo free?
Dooo is free to download, with in-app purchases available.
Is Syn9 free?
Syn9 is free to download, with in-app purchases available.
Do Dooo or Syn9 have ads?
Neither Dooo nor Syn9 shows ads.
Which is updated more often, Dooo or Syn9?
Dooo ships an update every 3 days, and Syn9 every 5 days. Most recently, Dooo was updated on October 30, 2026 and Syn9 on November 9, 2026.

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