Comparison

Sudoku² vs BioTechShala

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

Head to head

Sudoku²

Practice Sudoku Daily

Free

📚 Education

★ 3.910 ratingsView app →

About

Sudoku²

Engage with an endless supply of Sudoku puzzles, ranging from easy to challenging difficulty levels. Features include a distraction-free input pad, note-taking with color options, and customizable error checking. Unlock new levels by completing a single puzzle.

Highlights

Infinite Sudoku puzzles
Adjustable difficulty levels
Distraction-free input pad
Color-coded note-taking
Manual/automatic note-taking
Customizable error checking
Multiple highlight modes

Features

Read full description

Infinite free Sudoku puzzles with levels from Easy to Evil! Key features: -Solve just one puzzle to unlock next level -Input pad with no distractions -Redo/Undo -Taking/Erasing notes with different colors -Taking notes manually or automatically -Error check can be enabled or disabled -Multiple highlight mode

About

BioTechShala

Read full description

Get Personalized Learning Outcomes for everyone. An in-depth performance analysis, where you can know your strong and weak points, your all India rank, your state rank etc. You will also get a virtual tutor who is completely dedicated to bringing out the best in you. It will prioritize your concepts, chapters, topics, and questions through machine learning. Get this innovative learning experience only on BioTech!!

Screenshots

Sudoku²4 screens

BioTechShala4 screens

Verdict

The call

The clearest difference is ads: BioTechShala at none against Sudoku²'s shown. Sudoku²'s advantage is update cadence (every 4 months vs every 10 months) and iOS requirement (12.0 vs 15.5). On price, 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

Both are free to download. Sudoku² sells 1 one-off in-app purchase and BioTechShala sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sudoku² ships an update every 4 months, BioTechShala every 10 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level

Sudoku² versus BioTechShala: the parameters behind the verdict, then further details
Parameter	Sudoku²	BioTechShala
Price	Free	Free
Rating	3.9 (10 ratings) — better	—
Positive reviews	80.8% of reviews	—
Number of ratings	10 — better	—
Update frequency	Every 4 months — better	Every 10 months
Ads	Yes	No — better
In-app purchases	Yes	Yes
Monetization	Free with in-app purchases	—
Devices	iPhone, iPad, iPod, Apple Watch — better	iPhone, iPad, iPod
Requires iOS	12.0 — better	15.5
Further details — not scored
Size	6 MB	147 MB
Age rating	4+	4+
Developer	春李	Online Learning

In-app purchases

1 purchases

Sudoku²

One-time1

Remove Advertisement$0.99

10 purchases

BioTechShala

One-time10

Package - AF$19.99
Package - AN$29.99
Package - AT$34.99

Show 7 more

Package - AU$34.99
Package - BD$39.99
Package - AY$39.99
Package - BA$39.99
Package - BB$39.99
Package - BE$44.99
Package - BG$49.99

Questions

Is Sudoku² free?

Sudoku² is free to download, with in-app purchases available.

Is BioTechShala free?

BioTechShala is free to download, with in-app purchases available.

Do Sudoku² or BioTechShala have ads?

Sudoku² shows ads; BioTechShala does not.

Which is updated more often, Sudoku² or BioTechShala?

Sudoku² ships an update every 4 months, and BioTechShala every 10 months. Most recently, Sudoku² was updated on November 6, 2026 and BioTechShala on November 4, 2026.