Comparison

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.

Head to head
About

メモモモモ

Features
Read full description

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。

About

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.

Highlights
  • 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
Features
Read full description

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

メモモモモ3 screens
Deadline Backsolve4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

メモモモモ ships an update every 2 months, Deadline Backsolve weekly. Both last shipped on October 25, 2026.

Scorecard4 real differences · 4 level
メモモモモ versus Deadline Backsolve: the parameters behind the verdict, then further details
ParameterメモモモモDeadline Backsolve
PriceFree — better$0.99
Positive reviews92.9% of reviews100.0% of reviews — better
Update frequencyEvery 2 monthsWeekly — better
AdsYesNo — better
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.2 — better17.0
Further details — not scored
Size18 MB4 MB
Age rating4+4+
DeveloperHiroki SatoDaisuke Yamaguchi

Customer experience

メモモモモ

Written reviews28 reviews
Positive92.9%
Neutral3.6%
Negative3.6%

Deadline Backsolve

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

メモモモモ

No in-app purchases

None

Deadline Backsolve

No in-app purchases

Questions

Is メモモモモ free?
メモモモモ is free to download, with no in-app purchases.
Is Deadline Backsolve free?
Deadline Backsolve costs $0.99, with no in-app purchases.
Do メモモモモ or Deadline Backsolve have ads?
メモモモモ shows ads; Deadline Backsolve does not.
Which is updated more often, メモモモモ or Deadline Backsolve?
メモモモモ ships an update every 2 months, and Deadline Backsolve weekly. Most recently, メモモモモ was updated on October 25, 2026 and Deadline Backsolve on October 25, 2026.

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