SumsApp vs WaterDrops ー 達成タスクが水に変わりスッキリ！
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SumsApp
This smart notepad automatically detects numbers within your notes and calculates their totals. Organize notes into folders for combined totals and use advanced search to filter and sum specific entries. It's a calculator and spreadsheet replacement for everyday number tracking.
- Automatic number detection
- Automatic total calculation
- Notes organization into folders
- Combined folder totals
- Advanced search and filtering
- Freestyle note-taking with numbers
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SumsApp is a smart notepad that detects numbers in your notes and calculates totals automatically. Use it to quickly jot down: - Quotes and estimates - Shopping or to-do lists - Expenses and daily spending - Anything with numbers, freestyle Put notes into folders to see combined totals—perfect for trip budgets or tracking categories. Advanced search lets you filter and total exactly what you need. No spreadsheets. No calculators. Just type and total.
WaterDrops ー 達成タスクが水に変わりスッキリ！
Visualize your daily actions and achievements to gamify task completion. This app helps you break down future goals into simple, manageable steps, guiding you to execute them with focus.
- Visualize actions and achievements
- Gamified task completion
- Break down goals into simple steps
- Focus on immediate actions
- Supports iPhone and iPad
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広告なし。怒涛の行動ラッシュ！ 2021/1/19 BS11 『どっぷりアプリ』で紹介されました。 WaterDropsで、目の前の小さな行動と成果を視覚化し、ゲーム感覚で、タスクをこなそう。 未来に求める成果 ← 成果の種類 ←行動のまとまり（プロジェクト） ← ひとつひとつの行動（タスク） 望む未来の実現 ＝ 未来から逆算して、今、目の前ですべきほんのわずかなシンプルな行動を導き出して、一心不乱に遂行する WaterDropは、そのサポートをします。
Screenshots
Verdict
The clearest difference is in-app purchases: WaterDrops ー 達成タスクが水に変わりスッキリ！ at none against SumsApp's 3. WaterDrops ー 達成タスクが水に変わりスッキリ！ also leads on rating (5.0 vs 4.6) and update cadence (every 2 days vs every 9 days). SumsApp's advantage is ratings volume (169 vs 1). On price, ads 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. SumsApp sells 3 in-app purchases, starting at $0.99 per month. WaterDrops ー 達成タスクが水に変わりスッキリ！ asks for nothing beyond the download.
WaterDrops ー 達成タスクが水に変わりスッキリ！ holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: SumsApp has 169 ratings behind it against 1, so its average is the more settled of the two.
SumsApp ships an update every 9 days, WaterDrops ー 達成タスクが水に変わりスッキリ！ every 2 days. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.
| Parameter | SumsApp | WaterDrops ー 達成タスクが水に変わりスッキリ！ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (169 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 63.2% of reviews | — |
| Number of ratings | 169 — better | 1 |
| Update frequency | Every 9 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 250 MB |
| Age rating | 4+ | 4+ |
| Developer | Tsuyoshi Niwa | takanori hosoi |
Customer experience
SumsApp
WaterDrops ー 達成タスクが水に変わりスッキリ！
Bugs and requests
SumsApp
Reported bugs
13 issues- Data is deleted/lost
- App crashes after recent update
- Pop-up prompts for Pro version appear constantly
- Restore purchase does not work
- Information entered disappears
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- Calculations are incorrect
- App no longer saves data
- Paid features are inaccessible without subscription
- App was renamed and requires repurchase
- Unable to delete folders without premium subscription
- Pop-up ads flood the screen
- When selecting 'numbers only' to remove, everything is deleted
- Data reverts or disappears after updates
Requested features
13 requests- Add '+' and '÷' symbols to number bar
- Option to sync Mac version
- Ability to group files for 'Totals' figure
- Button to add date stamp
- Option to automatically display date in notes
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- Add a 'recently deleted' tab
- Option to only sum numbers preceded by a symbol
- Implement a checkbox for reflecting/not reflecting in total for budget adjustments
- Ability to delete multiple items simultaneously without data loss
- Option to make the app available on Android
- Add a half-width space and '+' to the number input field
- Ability to exclude specific text from sums
- Option to add a tax calculation feature (e.g., calculate tax-exclusive amounts)
WaterDrops ー 達成タスクが水に変わりスッキリ！
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SumsApp
- Monthly Subscription1 Month trial$0.991 Month
- Every 6 Months$4.496 Months
- Yearly Subscription$7.991 Year
WaterDrops ー 達成タスクが水に変わりスッキリ！
No in-app purchases
Questions
Is SumsApp free?
Is WaterDrops ー 達成タスクが水に変わりスッキリ！ free?
Which has better reviews, SumsApp or WaterDrops ー 達成タスクが水に変わりスッキリ！?
Do SumsApp or WaterDrops ー 達成タスクが水に変わりスッキリ！ have ads?
Which is updated more often, SumsApp or WaterDrops ー 達成タスクが水に変わりスッキリ！?
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