Mole Digging vs One Line Fill
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
Mole Digging
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When you start the game, you are presented with a series of tiles. The object of the game is to connect all the tiles with a single stroke. There are 17 difficulty levels. It is a brain puzzle that can be played as many times as you like. It is fun to watch the cute mole digging.
One Line Fill
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A one line fill puzzle with a cute caterpillar! Draw a single path through every square, fill the whole grid, and munch every leaf on the way to the warp tile. Easy rules, real logic: a relaxing brain teaser and brain training game for quick breaks. You can't visit the same square twice, so plan your route like a maze and enjoy the moment the path finally clicks. โ How to Play - Tap or drag to move the caterpillar across the grid - Eat the leaf on every square to fill the board - One stroke rule: no square can be visited twice - Drag back over your trail to rewind, even all the way to the start, and retry freely - Eat every leaf, then reach the warp tile to clear the stage โ 2,000 Stages on One Path - Clear a stage and go straight to the next one - Boards grow from 3ร4 up to 8ร9 as the fill puzzles get deeper - No lives and no time limit: play at your own pace โ Beginner to Expert, Step by Step You start on a tiny 3ร4 board where thinking a few moves ahead is enough, even if you're new to puzzles. The grid then grows to 4ร5, 5ร6, 6ร7, 7ร8 and finally 8ร9. More squares mean more possible paths, and simple line puzzles turn into real logic puzzles. Beginners get a light brain teaser, while experienced puzzlers get a genuine challenge. โ Tips - Build your route from the corners and edges to avoid dead ends - Visit squares that could become dead ends early - Keep a path open to the warp tile for the final moves - Stuck? A hint shows you the correct route โ How to Solve One Line Puzzles One stroke puzzles reward logic, not luck. Start with the corners and with squares that have few open neighbors: with only one or two ways in and out, their order is almost fixed, and those forced moves reveal the shape of the whole path. Next, make sure no square is left stranded behind the caterpillar, because a walled-off square can never be reached again. Finally, work backward from the warp tile and decide the last few moves first. Thinking ahead like this makes a relaxed daily brain workout. โ Features - A cute caterpillar (worm) character with calm, cozy visuals - One line, line fill, block fill and path puzzles in one game - Logic puzzles built on the Hamiltonian path - Portrait mode with simple tap and drag controls - Background music can be switched on or off, handy in quiet places - Free to play โ Great Ways to Play - Five minutes of brain training before bed or with your morning coffee - A time killer on your commute or while you wait โ FAQ Q. What is a one line puzzle? A. You connect every square on the board with a single line, never passing through the same square twice. It's also known as a one stroke puzzle or one touch drawing. Q. What if I get stuck? A. A hint reveals the correct route on the board step by step. Hints are limited, and you can get more by watching an ad. Q. I'm not good at puzzles. Can I still play? A. Yes. Stages start on small 3ร4 boards, with no lives and no time limit, so you can retry as often as you like. Q. How many stages are there? A. 2,000. Each clear takes you to the next stage, and the board slowly grows. Q. How is this different from other line or connect puzzles? A. Unlike games where you connect dots of the same color or trace the edges of a shape, this is a fill-type one line puzzle: one path fills every square on the board. A perfect fit if you love grid fill puzzles. โ Perfect For - Fans of one line games, connect games and fill puzzles - Adults who want daily brain training or a quick brain teaser - Players who love mazes, logic puzzles and thinking games - Anyone looking for a casual time killer with simple, easy rules Munch every leaf and reach the warp tile. Can you clear all 2,000 one line puzzles?
Screenshots
Verdict
The clearest difference is in-app purchases: One Line Fill at none against Mole Digging's 1. Mole Digging's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Mole Digging sells 1 one-off in-app purchase. One Line Fill asks for nothing beyond the download.
Mole Digging ships an update every 2 months, One Line Fill monthly. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.
| Parameter | Mole Digging | One Line Fill |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Monthly โ better |
| Ads | No โ better | Yes |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 24 MB | 107 MB |
| Age rating | 4+ | 4+ |
| Developer | akira ohmachi | Gentak Works |
In-app purchases
Mole Digging
- Remove Ads$1.99
One Line Fill
No in-app purchases
Questions
Is Mole Digging free?
Is One Line Fill free?
Do Mole Digging or One Line Fill have ads?
Which is updated more often, Mole Digging or One Line Fill?
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