Comparison

QSolveSudoku vs Kodo

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

Head to head
About

QSolveSudoku

Features
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1. A little assistant to help solve headache Sudoku problems 2. Support to quickly import Sudoku from pictures 3. Check for multiple solutions 4. Check the full path of the Sudoku solution 5. View the specific reasons for each step of the Sudoku solution in detail This app contains paid subscription features under the following End User License Agreement: (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Kodo

Features
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Kodo lets you feel the heartbeats of different animals through your iPhone's vibrations and animation. A human heart beats about 70 times a minute. A sparrow's beats around 800 times, and an elephant's only about 20. Numbers like these are hard to imagine, but in the palm of your hand the difference is unmistakable. - A collection of heartbeats Nine animals are laid out like specimens in a display case: human, sparrow, elephant, octopus, chicken, cat, dog, horse and mouse. Inside each outline, a red heart beats at its real pace. - Feel it through vibration Choose an animal and your iPhone pulses at its heart rate. Small animals beat fast, large ones slowly. Close your eyes and compare. - Heart rates that change Switch a human between rest, exercise and sleep, or a horse between rest and full gallop, and the heart rate changes with it. - Heart monitor view Switch to text view to see every animal's heartbeat at once as a moving ECG trace, like a hospital monitor. Heart rates are approximate.

Screenshots

QSolveSudoku4 screens
Kodo4 screens

Verdict

The call

The clearest difference is in-app purchases: Kodo at none against QSolveSudoku's 2. QSolveSudoku's advantage is ads (none vs shown) and update cadence (every 5 days vs every 14 months). On price 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

Both are free to download. QSolveSudoku sells 2 in-app purchases, starting at $0.49 per month. Kodo asks for nothing beyond the download.

UpkeepUpdate frequency

QSolveSudoku ships an update every 5 days, Kodo every 14 months. Both last shipped on November 3, 2026.

Scorecard5 real differences · 1 level
QSolveSudoku versus Kodo: the parameters behind the verdict, then further details
ParameterQSolveSudokuKodo
PriceFreeFree
Update frequencyEvery 5 days — betterEvery 14 months
AdsNo — betterYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size2 MB9 MB
Age rating4+4+
Developer青 王Harumi Sagawa

In-app purchases

2 purchases

QSolveSudoku

Subscriptions1
  • Professional Edition$0.491 Month
One-time1
  • Professional Edition$0.99
None

Kodo

No in-app purchases

Questions

Is QSolveSudoku free?
QSolveSudoku is free to download, with in-app purchases available.
Is Kodo free?
Kodo is free to download, with no in-app purchases.
Do QSolveSudoku or Kodo have ads?
Kodo shows ads; QSolveSudoku does not.
Which is updated more often, QSolveSudoku or Kodo?
QSolveSudoku ships an update every 5 days, and Kodo every 14 months. Most recently, QSolveSudoku was updated on November 3, 2026 and Kodo on November 3, 2026.

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