メモモモモ vs Deadline Backsolve
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
メモモモモ
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メモモモモは、グループごとにメモを保存できるメモアプリです。 メモグループを作成して、メモを作成します。 グループごとに色を設定したり、文字サイズ等の細かい設定もできます。 【メモの検索】 全てのメモの中から、キーワードで検索することができます。 【メモの統合】 同じグループのメモを一つにまとめることができます。 【メモの分割】 一つのメモを複数のメモに分割することができます。 手順は以下の通り ①メモ中の分割したい箇所にカーソルを移動 ②キーボード上部のハサミボタンを押下(分割用の文字が入ります) ③右上の『分割』ボタンを押下 ④ポップアップ画面が出るので、問題なければOKボタン押下。
Deadline Backsolve
This app helps you adjust project plans when deadlines are at risk. It calculates the shortfall and suggests concrete adjustments like extending deadlines or reducing scope. The interface is currently in Japanese only.
- Calculates shortfall and suggests fixes
- Adjusts plans based on available time
- Learns user's real work pace
- Offers recovery plan options
- Focus timer that survives crashes
- Offline functionality
- JSON export/import for data transfer
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When you realize you won't hit the deadline, what you actually need is the answer to "so what do I change?" Deadline Backsolve computes the shortfall and gives you concrete fixes: "push the deadline 3 days", "add 45 minutes per working day", "cut 4 pages". Real numbers, not a warning label. ■ Three inputs. Thirty seconds. What, how much, by when. That's the whole setup. Stages and per-weekday hours can wait until later. ■ Split the work into stages (new in 1.4) Thumbnails → pencils → inks → finishing, or outline → first draft → revision. Give each stage its share of the time per page, and the Today screen tells you exactly what to do: "Pencils 6 pages → then Inks 2 pages". The project screen shows each stage's progress. Stages are optional, and recovery plans keep working as before. ■ You only look at today The home screen says "Today: 8 pages." That's it. No Gantt charts, no dense tables. Tap "+1 page" when you're done. ■ It follows your real week One hour on weekdays, three on weekends? Your quota is distributed by the time you actually have. ■ It learns your real pace It starts from an estimate, then switches to your measured minutes per page once you have logged enough work. ■ Recovery plans, computed - Switch to a later registered deadline (with hours gained) - Extend the deadline by N days - Add N minutes per working day - Cut N units - Finish each unit within N minutes - Open up a day you had marked as rest Tap any of them to apply it to the plan immediately. ■ A focus timer that survives a crash It stores the start time, so closing the app never loses your session. It never plays a sound effect. ■ Your entries stay on your device No account. No ads. What you enter never leaves your device. To improve the app, only anonymous usage data (such as which screens are opened) is counted with Google Analytics (you can turn this off in Settings). Move it with a JSON export/import when you change phones. ■ One-time purchase. No add-ons. Everything is unlocked at purchase. Unlimited projects and logs. No subscription. ■ Available in English, Japanese, German, French, Korean and Traditional Chinese. Works for comics, novels, illustration books and merch, but also for articles, reports and theses — anything with an amount and a due date. Name the unit whatever you like.
Screenshots
Verdict
The clearest difference is price: メモモモモ at Free against Deadline Backsolve's $0.99. メモモモモ also leads on iOS requirement (14.2 vs 17.0). Deadline Backsolve's advantage is ads (none vs shown) and update cadence (weekly vs every 2 months). On review sentiment, 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
メモモモモ is free to download; Deadline Backsolve costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
メモモモモ ships an update every 2 months, Deadline Backsolve weekly. Both last shipped on October 25, 2026.
| Parameter | メモモモモ | Deadline Backsolve |
|---|---|---|
| Price | Free — better | $0.99 |
| Positive reviews | 92.9% of reviews | 100.0% of reviews — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.2 — better | 17.0 |
| Further details — not scored | ||
| Size | 18 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroki Sato | Daisuke Yamaguchi |
Customer experience
メモモモモ
Deadline Backsolve
In-app purchases
メモモモモ
No in-app purchases
Deadline Backsolve
No in-app purchases









