01 · Product
0Daily
Four puzzles, one daily ritual, and not a single ad.
- Sudoku, from gentle to expert, plus unlimited boards any time.
- Letters: six tries to find a five-letter word.
- A 5x5 mini crossword with original clues and a difficulty setting.
- Blocks: roll a rectangular block across a floating platform without tipping it off the edge.
- A streak per game, plus combined stats across all four.
- Game Center leaderboards for the daily runs.
- iCloud sync, so a streak survives a new phone.
- No banner ads, no interstitials, no rewarded video.
SwiftUI and SwiftData throughout, with CloudKit sync and Game Center leaderboards. Blocks renders in SceneKit.
The crossword is generated, not pulled from a fixed pool. Filling a dense 5x5 grid where six five-letter words all interlock is a genuinely hard constraint problem, and the first version could hang for nine seconds on an unlucky seed. The fix was a position-indexed word lookup that turns the inner loop into set intersections instead of a linear scan, plus forward checking so a doomed branch gets abandoned early.
Every Blocks level is checked by a breadth-first solver before it ships, and the same solver computes par. A level that cannot be solved never reaches a player, and the "perfect" stamp means the solution actually was the shortest one available.
Free to play. 0Daily Plus is an optional subscription, not a gate on the daily puzzles.
- Free
- All four games, every daily puzzle
- 0Daily Plus
- Unlimited hints, the full archive, and themes
Is it actually free?
Yes. All four games and their daily puzzles are free. Plus is optional and adds unlimited hints, the back archive, and themes.
Are there ads?
None at all. No banners, no interstitials, no rewarded video. That was the original reason to build it.
What happened to the Sudoku app?
0Daily is that app. It started as a single Sudoku game, grew into a four-game hub, and was renamed to match. Existing purchases carried over.
Does my streak survive a new phone?
Yes, as long as you are signed into the same iCloud account. Progress syncs through CloudKit.
0ARCH is a one-person software studio. These apps are what gets built between client projects, and they are where a pattern gets proven before it shows up in someone's production system. The same person who shipped this wrote the ERP that replaced a distributor's spreadsheets.