Comparison

Sudoku Puzzle Solver vs Cache Notifier

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

Head to head
About

Sudoku Puzzle Solver

This app quickly solves Sudoku puzzles of any difficulty level. It highlights solved cells in green and can identify invalid or unsolvable puzzles. Users can also use a 'PEEK' feature to see possible values for each cell, acting as a manual solving assistant.

Highlights
  • Solves Sudoku puzzles in seconds
  • Supports easy, medium, hard, and expert difficulties
  • Identifies invalid or unsolvable puzzles
  • Highlights solved cells in green
  • PEEK feature shows possible cell values
  • Acts as a manual solving assistant
Features
Read full description

Sudoku Puzzle Solver will solves Sudoku problem within seconds. Sudoku Puzzle Solver has been tested with various Sudoku difficulty levels; easy, medium, hard & expert, it never fails as long as the puzzle is valid. Sudoku Puzzle Solver is easy to use as it is really straight forward. Just tap the cell where the value is known & set it as required by choosing the correct number for the cell. Repeat the process until all known cells are filled. Once all done, just tap SOLVE to let Sudoku Puzzle Solver app do the magic. All the solved cells will be highlighted in green for your reference. It will also tells you if the puzzle that you have provided cannot be solved or an invalid puzzle after it has finished checking. In this case, you have to re-checked, whether the Sudoku puzzle supplied is not matching the Sudoku puzzle that you wanted to solve, perhaps you have input one or more values in the wrong cells. Before solving any Sudoku Puzzle, you can also tap the PEEK button to view all the possible values for each cells for that given Sudoku Puzzle. This is useful if you want to solve the Sudoku Puzzle manually without using the auto solve solution, this way the Sudoku Puzzle Solver app will just act as a helper to you. If you see an empty cell while using the PEEK feature, this means that there is no possible value for that cell (the end). Note that you have to tap on PEEK button everytime after you have updated any cells to update as it will not auto update for you. So what are you waiting for, get Sudoku Puzzle Solver app now & start solving those super difficult Sudoku challenge & puzzle out there in seconds. ** Note that there were very few extremely difficult Sudoku puzzle that we have tested requires a little bit of time to solve them (our record max is 22s). So please be patient while waiting, should you encounter one of the type, thank you & ENJOY!

About

Cache Notifier

This app automatically updates your location for geocaching services, ensuring you're notified of new caches nearby. It helps you find new geocaches quickly, even when traveling, without manual updates.

Highlights
  • Automatic location updates
  • Real-time new cache notifications
  • Helps snag First To Find (FTF)
  • Effortless travel updates
  • Requires Project-GC premium
Read full description

Requires an active Project-GC premium subscription. Never miss a new geocache again! Cache Notifier automatically keeps your Project-GC location up to date, so you’re always in the loop when new caches are published nearby—helping you snag those FTFs even faster. Whether you’re on the move or traveling, your location stays updated effortlessly—no manual steps needed.

Screenshots

Sudoku Puzzle Solver4 screens
Cache Notifier3 screens

Verdict

The call

The clearest difference is price: Sudoku Puzzle Solver at Free against Cache Notifier's $2.99. Sudoku Puzzle Solver also leads on rating (4.7 vs 3.0) and ratings volume (18 vs 2). Cache Notifier's advantage is ads (none vs shown) and update cadence (every 2 months vs every 38 months). On 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

Sudoku Puzzle Solver is free to download; Cache Notifier costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sudoku Puzzle Solver holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Sudoku Puzzle Solver has 18 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Sudoku Puzzle Solver ships an update every 38 months, Cache Notifier every 2 months. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

Scorecard7 real differences · 3 level
Sudoku Puzzle Solver versus Cache Notifier: the parameters behind the verdict, then further details
ParameterSudoku Puzzle SolverCache Notifier
PriceFree — better$2.99
Rating4.7 (18 ratings) — better3.0 (2 ratings)
Positive reviews—0.0% of reviews
Number of ratings18 — better2
Update frequencyEvery 38 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported — betterPaid
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size5 MB1 MB
Age rating4+4+
DeveloperaZeR DiLLsNicolas Camenisch

Customer experience

Sudoku Puzzle Solver

All ratings16 ratings
Positive93.8%
Neutral0.0%
Negative6.3%

Cache Notifier

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Sudoku Puzzle Solver

No in-app purchases

None

Cache Notifier

No in-app purchases

Questions

Is Sudoku Puzzle Solver free?
Sudoku Puzzle Solver is free to download, with no in-app purchases.
Is Cache Notifier free?
Cache Notifier costs $2.99, with no in-app purchases.
Which has better reviews, Sudoku Puzzle Solver or Cache Notifier?
Sudoku Puzzle Solver is rated higher. Sudoku Puzzle Solver averages 4.7 out of 5 from 18 ratings, while Cache Notifier averages 3.0 from 2 ratings.
Do Sudoku Puzzle Solver or Cache Notifier have ads?
Sudoku Puzzle Solver shows ads; Cache Notifier does not.
Which is updated more often, Sudoku Puzzle Solver or Cache Notifier?
Sudoku Puzzle Solver ships an update every 38 months, and Cache Notifier every 2 months. Most recently, Sudoku Puzzle Solver was updated on September 29, 2026 and Cache Notifier on October 10, 2026.

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