Exactly One Answer
Every board is verified to have a single solution given the tiles in your bank. You will never do the math right and still be told you are wrong.
Free to play · No ads · iOS
One answer.
Always findable.
Math, crossed.
A math crossword. Drag number tiles from the bank into a grid of equations until every row and column comes out true. Every puzzle has exactly one solution and can always be reasoned out. No guessing, no dead ends, no ads.
Features
Puzzles that hold up.
Nothing in the way.
Most math crosswords will hand you a board with two right answers, or one with none at all. Solvara checks every puzzle before you ever see it.
Never a Dead End
A puzzle is only accepted if it can be solved by reasoning from start to finish. No guessing is ever required, and an unsolvable board cannot reach you.
No Ads, Ever
Not one ad, not one interstitial. Free to download and play, with an optional one-time purchase. No subscription, no currency, no video to watch for a hint.
Difficulty You Can Trust
Hard means longer chains of deduction, not bigger arithmetic. Easy, Medium and Hard differ in how deep you have to think, not how large the numbers get.
Daily Puzzle & Streaks
A new puzzle every day, the same one for everybody. Solve anything to keep your streak alive, and an earned freeze covers the day you miss.
Hints That Teach
Stuck? A hint points at the right row, then explains the reasoning, then places one tile so you finish it yourself. It never solves the puzzle for you.
Your Record Follows You
Streaks and history sync through your own iCloud account, so a new phone does not cost you your streak. We never see any of it.
Themes and Backgrounds
Four color palettes and a set of living background scenes, from falling snow to drifting blossom. Two are free so you can see what they do.
Screens
See it before you get it.
Real screens from the app. What you see here is what ships.
How it works
Pick up and solve.
No account, no tutorial you cannot skip, no timer pressuring you.
Read the board
An interlocking grid of equations, some numbers already filled in. Below it, a bank holding every number you still need. Nothing is hidden from you.
Work out what must go where
Deduction comes from the bank as much as the arithmetic. If only one tile can make a row true, that is where it goes. Rows flash green as they come out right.
Come back tomorrow
A new daily puzzle every morning, free at every difficulty, plus free numbered sets on each level. Go Unlimited once for freshly generated puzzles whenever you want them.
FAQ
Common questions.
Is it really free?
Free to download and play. No account, no ads. Free play has numbered game sets at every level, plus a new daily puzzle each day. Want more? Solvara Unlimited is one purchase of $4.99 in the U.S. It adds fresh puzzles with no end, endless hints, and every look and scene. Pay once, keep it forever. No subscription.
What makes it different from other math crosswords?
Two guarantees the others do not make. Every puzzle is verified to have exactly one solution given your tiles, so you can never do the math correctly and be marked wrong. And every puzzle is verified solvable by pure reasoning, so you can never be handed a board that cannot be finished.
Do I need an account?
No. Download and play. Your progress saves on your device, and your record syncs through your own iCloud account if you have iCloud switched on.
Does it work offline?
Yes. Puzzles are generated on your device. Nothing needs a connection.
What devices are supported?
Solvara runs on iPhone and iPad.
Ready to solve?
Free to download, no account required, and no ads at any point.
Coming soon to the App Store