Syn9 vs GroupTodo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Syn9
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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
GroupTodo
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Organize your daily to-dos with ease. Share them with others whenever you need. GroupTodo is a simple to-do app that works well for personal use. You can organize shopping lists, chores, schedules, travel plans, work tasks, and more by group. Start by using it as your own personal to-do list. When you want to share a list with family, friends, or a team, you can share the same group as it is. There’s no need to switch between separate apps for personal and shared tasks. You can add comments and photos to each task, making it easy to keep notes, details, and follow-ups in one place. When using a shared group, quick messages like “Can you buy this?” or “Done” stay right inside the related task. GroupTodo also supports due date reminders and update notifications. Manage what you need to do today, what you don’t want to forget, and what you want to work on with others. Recommended for people who want to: ・Use a simple, easy-to-read to-do app ・Organize shopping, chores, schedules, and work tasks ・Share lists with family or friends when needed ・Keep notes, photos, and conversations for each task ・Manage both personal and shared tasks in one app Main features: ・Organize tasks by group ・Use as a personal to-do list ・Share groups whenever you need ・Add comments and photos to each task ・Unread badges for new comments ・Due date reminders: on the day, the day before, and overdue notifications ・Update notifications for added and completed tasks ・iCloud sync, iPhone and iPad support From personal to-dos to shared planning. Make your tasks smoother with GroupTodo.
Screenshots
Verdict
The clearest difference is in-app purchases: GroupTodo at none against Syn9's 6. Syn9's advantage is ads (none vs shown) and update cadence (every 2 days vs every 4 days). On price 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. Syn9 sells 6 in-app purchases, starting at $3.00 per month. GroupTodo asks for nothing beyond the download.
Syn9 ships an update every 2 days, GroupTodo every 4 days. The most recent releases landed on October 18, 2026 and September 22, 2026 respectively.
| Parameter | Syn9 | GroupTodo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 4 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 57 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Tomohiro Sekikawa | nanawork |
In-app purchases
Syn9
- Plus$3.001 Month
- Max$6.991 Month
- Plus annual$29.001 Year
- Light size$1.99
- Regular size$3.99
- Generous size$7.99
GroupTodo
No in-app purchases









