Number your visits from 1 to 9 or draw a line. Start on any square. Move one square up, down, left or right each time and visit every square exactly once. When a section reaches its target, circle that square and restart the sum at zero on the next square.
Check your route. The last target must end on visit 9. Are the three circled squares in the right order?
Start on any tile. When your sum hits a target, start counting the next one from zero. Finish the last target on the last tile.
Current segment: 0 / —Tiles used: 0 / 9
Tap any tile to start.
Solution:
Each local calendar date has its own web board. Choose a weekday below to play one of the seven original practice boards. Both modes are separate from the iPhone daily.
Link to this board · Your last 30 played boards can resume in this browser.
Sudoku asks you to hold nine constraints in your head at once. Wordle asks you to know words. This asks you to add small numbers and not lift your finger. The rule: one path through every tile, no diagonals, no revisits, and your running total must hit each target in order; when it does, the tile locks, and you start counting again from zero. The last target has to land on the last tile. That is the whole game, and it is enough.
Questions about the puzzle
What is Sumthread?
A number-path puzzle with one rule: trace a single continuous path through every tile on the grid, up, down, left or right, no diagonals, no revisits, while hitting the ordered target sums at the top in exact sequence. Each time your running sum reaches the active target, that tile locks as a checkpoint and the next segment starts from zero; the final target must land on the last tile. The puzzle above is the same rule on a 3×3 board.
Is this a good daily number puzzle for beginners?
The rule fits in one sentence, the small boards are forgiving, and there is no clock. This web puzzle uses a 3×3 board. In the app, Starter Threads offers small boards, and the daily challenge uses a 4×4 grid.
How do I get started if I am stuck?
Count backwards. The last target must finish on the last tile, so the final segment is often the easiest to pin down. Then look for a corner: a corner tile has only two neighbours, so a path can only pass through it one way or start or end there.
Is Sumthread free?
The listing describes 100% offline play with no account, no ads and no third-party tracking, and mentions no purchases. We have no evidence of one either way; if that changes we will update this page.
Does it have a daily puzzle?
Yes: one fresh 4×4 board generated each day, with local completion history and spoiler-free emoji-grid sharing, per the listing. This separate 3×3 web companion generates its board from the calendar date. Seven original weekday boards are also available as practice.
What is a Clean Weave?
Finishing a board with zero hints and zero undos. The app gives it a seal; this page gives you nothing but the satisfaction.
Wednesday, 7:50 am, made up but familiar
7:50Kettle on. The 4×4 daily in the app: targets 9, 12, 12, 13. You start in a corner, because corners only have two ways out.
7:53Second target reached one tile early, which means the segment is wrong, not the arithmetic. Drag back two tiles. The amber ring appears on the right one.
7:57Last target lands on the last tile. The corrected path reaches all four targets. You can share the emoji grid without giving away the route. The kettle has boiled.
If the sum is right but the tile count is wrong, the path is wrong. Count tiles, not numbers.
Four daily puzzles, compared for a beginner
Wordle
Rules to hold
One: guess the five-letter word in six tries
Needs
Vocabulary
Time
A few minutes
Forgiving?
Six tries, then it is over for the day
Sudoku
Rules to hold
Three at once: row, column, box
Needs
Patience and a pencil habit
Time
Ten minutes to an hour
Forgiving?
One wrong digit can poison a region
KenKen
Rules to hold
Sudoku's rows and columns plus arithmetic cages
Needs
Arithmetic and the Sudoku habit
Time
Varies by size
Forgiving?
About as much as Sudoku
Sumthread (ours)
Rules to hold
One: a path through every tile hitting the targets in order
Needs
Adding numbers to about 20
Time
About five minutes, per the listing
Forgiving?
Backtrack by dragging; pause mid-path; no clock
How the app runs it
One continuous thread.Drag across adjacent tiles or tap step by step; backtrack by dragging backwards or tapping an earlier tile on your path.
Reach and exact-match cues.Dashed borders show the tiles you can move to; amber marks the neighbour that would complete the active target. Both are on the page puzzle too.
Daily, saved, collected.A fresh 4×4 daily with local history and emoji sharing; automatic local save mid-path; five collections from 3×3 starters to 4×5 boards; five board themes and high-contrast borders.
Starter Threads: 3×3, the same shape as the page puzzle.The daily 4×4 and its local history.Deep Weave in the Charcoal Dark theme.
Honest limits
Brand new.Released 2 November 2026, version 1.0.0, 3.8 MB. No reviews yet, and the five collections are what there is; the daily board is the renewable part.
Small numbers, real patience.The arithmetic never gets hard; the path-finding on 4×5 boards does. If you want hard sums, this is the wrong puzzle.
Solo, by design.No leaderboard, no account, no multiplayer. Sharing is an emoji grid.
iPhone, iOS 18.The page puzzle runs anywhere; the app does not.
Get Sumthread free
Sumthread. One path, every tile, targets in order. A fresh daily board, five collections, automatic save, no clock. 100% offline, no account, no ads.
Sumthread on the App Store (US · Canada), listing read 4 November 2026 (version 1.0.0): the rule, cues, Clean Weave, daily board, collections, themes, offline and privacy statements.
This companion uses the app’s published rule and keeps recent board IDs and tile paths in this browser when storage is available. Descriptions of Wordle, Sudoku and KenKen are rule summaries, not reviews.
Free daily number puzzle (play online)A free daily number puzzle to play in your browser: flip bridges so every island hits its target sum. New board every day, solution behind a tap.
Best rolling ball games for iPhone: beginner picksBest rolling ball games for iPhone for beginners, compared from their App Store listings: finish lines, download size, ads, offline play. Sort, get a pick.
