oorio Sudoku

What you can do

• Play a publisher-described 21,600 puzzles across six difficulty stages
• Learn 105 named techniques with examples and practice
• Use candidates, stepwise Coach and decision/timeline review
• Import a photographed grid with on-device recognition and manual correction

Explain one deduction

Start from the candidates in a single row, column or box and compare the Coach or guide explanation with the actual grid. The goal is to understand why a candidate is removed or a number is placed.

Use the result allowance deliberately

The current store description assigns detailed analysis and alternate solution paths to a shared result pass. Free users begin with 7 trials, followed by one new daily result through a rewarded ad. Ad-free retains a daily allowance, while Premium removes that result limit.

Release and evidence

The checked iOS release is 0.8.5, requiring iOS 15.5 or later. Official product and store material was checked November 11, 2026.

The gallery is credited to AIVERA / oorio and shows Android development build 0.8.4-dev (24). The current store release is 0.8.5; differences from the pictured development build remain possible.

Limitations & considerations

• Both current store pages identify version 0.8.5. The supplied gallery is genuine Android 0.8.4-dev(24) material and is labeled accordingly.
• Publisher puzzle/technique counts and recognition quality were not independently checked.
• The free Coach and puzzle access are distinct from the allowance for detailed analysis and alternate solution paths.

Privacy & permissions

The store says photographed-grid recognition runs on device and asks the user to correct recognized digits before saving.

Minimal usage data is described as enabled by default with a setting to disable it. File backup/restore is user-initiated; no automatic server backup is promised.

Use it for