Comparison

TodoKnock vs Deadline Backsolve

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

Head to head
About

TodoKnock

Features
Read full description

β–  What is TodoKnock? A count-focused progress tracker that visualizes "How many left?" for any goal. Set your target number, then tap each time you complete one. You'll always know exactly how close you are to finishing. β–  Perfect For - Reading 100 pages of a textbook - Watching 30 tutorial videos - Memorizing 50 vocabulary words daily - Doing 30 push-ups - Drawing 20 practice sketches If it has a number, you can track it. β–  Features That Keep You Going 【Progress Gauge】 Each tap updates your progress, showing your completion rate as a clear percentage. Celebrate with special effects when you hit 100%. 【Levels & XP】 Earn experience points with every entry. Level up and stay motivated to keep going. 【Daily Report】 Open the app the next day to see a summary of yesterday's achievements. 【Stats & History】 View your total level and completed tasks. See your cumulative effort at a glance. 【Cloud Sync】 Create an account to safely store your data. Transfer easily when switching devices. β–  Pricing Core features are free. An ad-free option (one-time purchase) is also available. Start visualizing "How many left?" and achieve your goals today!

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. β–  Three inputs. Thirty seconds. What, how much, by when. That's the whole setup. Stages and per-weekday hours can wait until later. β–  Split the work into stages (new in 1.4) Thumbnails β†’ pencils β†’ inks β†’ finishing, or outline β†’ first draft β†’ revision. Give each stage its share of the time per page, and the Today screen tells you exactly what to do: "Pencils 6 pages β†’ then Inks 2 pages". The project screen shows each stage's progress. Stages are optional, and recovery plans keep working as before. β–  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. β–  It follows your real week One hour on weekdays, three on weekends? Your quota is distributed by the time you actually have. β–  It learns your real pace It starts from an estimate, then switches to your measured minutes per page once you have logged enough work. β–  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. β–  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. β–  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. β–  One-time purchase. No add-ons. Everything is unlocked at purchase. Unlimited projects and logs. No subscription. β–  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 β€” anything with an amount and a due date. Name the unit whatever you like.

Screenshots

TodoKnock4 screens
Deadline Backsolve4 screens

Verdict

The call

The clearest difference is price: TodoKnock at Free against Deadline Backsolve's $0.99. Deadline Backsolve's advantage is in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

TodoKnock is free to download; Deadline Backsolve costs $0.99 up front. TodoKnock sells 1 one-off in-app purchase. Deadline Backsolve asks for nothing beyond the download.

UpkeepUpdate frequency

TodoKnock ships an update every 6 days, Deadline Backsolve every 4 days. Both last shipped on October 6, 2026.

Scorecard2 real differences Β· 6 level
TodoKnock versus Deadline Backsolve: the parameters behind the verdict, then further details
ParameterTodoKnockDeadline Backsolve
PriceFree β€” better$0.99
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 6 daysEvery 4 days β€” better
AdsNoNo
In-app purchasesYesNo β€” better
Monetizationβ€”Paid
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 β€” better17.0
Further details β€” not scored
Size56 MB4 MB
Age rating4+4+
DeveloperYuichi SasakiDaisuke Yamaguchi

In-app purchases

1 purchases

TodoKnock

One-time1
  • Remove Ads$1.99
None

Deadline Backsolve

No in-app purchases

Questions

Is TodoKnock free?
TodoKnock is free to download, with in-app purchases available.
Is Deadline Backsolve free?
Deadline Backsolve costs $0.99, with no in-app purchases.
Do TodoKnock or Deadline Backsolve have ads?
Neither TodoKnock nor Deadline Backsolve shows ads.
Which is updated more often, TodoKnock or Deadline Backsolve?
TodoKnock ships an update every 6 days, and Deadline Backsolve every 4 days. Most recently, TodoKnock was updated on October 6, 2026 and Deadline Backsolve on October 6, 2026.

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