Almost none of a word game's data goes on the puzzles. A grid is a few dozen letters, and a well-built game generates it on your phone rather than downloading it. The data goes on adverts, and video adverts cost thousands of times more than the game itself.
If you pay for mobile data by the megabyte, or share a connection with a household, or live somewhere a gigabyte costs real money, "how much data does this use" is not a trivia question. It decides what stays on the phone.
Puzzle games get a strange answer to it. The game itself is one of the lightest things you can install. What arrives alongside it often is not — and the gap between those two facts is where every complaint about a small game eating a data allowance comes from.
Where does a puzzle game's data actually go?
Not into the puzzles. Into the adverts, by an enormous margin.
It is worth seeing the scale of the difference. A 10×10 word search grid is a hundred characters. The word list beside it is perhaps sixty more. Even stored wastefully, with formatting and metadata around it, a complete puzzle is a few hundred bytes — smaller than this paragraph.
A single video advert is typically a few megabytes. That is not a modest difference; it is roughly four orders of magnitude. You could transmit every puzzle you will solve in a year for less data than one rewarded video.
So when a free puzzle game consumes a noticeable share of your allowance, the puzzles are not responsible, and no amount of playing fewer of them will help. The variable that matters is how many adverts you saw and what kind they were.
Does a word search download each puzzle?
It depends entirely on how the game was built, and this is the single most useful thing to check.
There are two architectures. In the first, puzzles are generated on a server and sent to your phone as you play. This is convenient for the developer — puzzles can be changed without an app update, and every solve is visible as analytics — but it means a connection is required for the game to function at all, and every grid is a network request.
In the second, the puzzle is generated on the device by an algorithm shipped inside the app. Nothing is fetched. The game works in a tunnel, on a plane, and on a dead connection, because there is nothing to wait for.
Word searches are unusually well suited to the second approach, because generating one is computationally trivial: place the words into a grid, check for collisions, fill the remaining cells with letters chosen to match the letter frequency of the words. That last step is what makes a grid hard rather than easy, and we take the whole algorithm apart in how word search puzzles are generated.
WordHunt uses the second architecture. Every grid is built on your phone, which is why the only thing that needs a connection is the advertising. We surveyed how the rest of the category handles this in the best offline word games on Android, and the answer is: inconsistently, and rarely in a way the store listing makes clear.
The practical test takes ten seconds. Turn on aeroplane mode and start a puzzle. If it loads, the game is generating locally. If it spins, you are renting your puzzles from a server.
Which advert format costs you the most data?
They differ by roughly a thousandfold, so it is worth knowing which is which.
- Banner adverts — the strip along the bottom of a menu screen. A static image, typically tens of kilobytes, refreshed on a timer. Cheap enough to be irrelevant on any plan.
- Interstitials — the full-screen advert between levels. Usually a still image or a light animation, so a few hundred kilobytes. Noticeable if you see a lot of them; not ruinous.
- Rewarded video — the thirty-second clip you watch in exchange for a bonus. This is the expensive one, typically a few megabytes per view, because it is video and it is generally fetched fresh rather than cached.
The useful consequence is that the expensive format is the optional one. Rewarded video is the only advert type you choose to watch, which means the single largest line in your data use is one you control completely. Decline every rewarded advert and the game's data consumption drops to something close to a rounding error.
This is also why install size tells you nothing. People reasonably assume a 40 MB app will be lighter on data than a 200 MB one. The relationship does not exist. A small app with aggressive video advertising will use far more data over a month than a large app that ships its content up front and shows a banner.
How a game places its adverts matters at least as much as how many it shows — a point we argue at length in free word games that do not interrupt play.
Can you play with no data at all?
Yes, and it is the one setting worth knowing.
In a game that generates puzzles locally, cutting the connection does not degrade anything. Put the phone in aeroplane mode, or revoke the app's mobile data permission in Android settings, and every puzzle still builds, every level still saves, and every streak still counts — because all of that lives on the device.
What stops is the advertising, because an advert that cannot be fetched cannot be shown. This is not a loophole and nobody is being cheated: you are simply the kind of user who does not generate advertising revenue, and the game continues to work. For a long flight, a commute through tunnels, or the last three days before your allowance resets, it is the obvious way to play.
Two honest caveats. Adverts are what fund a free game with no purchases, so playing permanently offline means the game earns nothing from you — worth knowing, even if it changes nothing about what you choose to do. And advertising is not quite the only network traffic: WordHunt also uses Firebase Analytics and crash reporting, both gated behind the same consent prompt as personalised advertising and both small, measured in kilobytes rather than megabytes. Declining consent switches all three off together. The full detail is in the privacy policy.
What about battery?
Mostly the screen, then the adverts, then — a long way back — the game.
A word search is one of the least demanding things a phone can do. There is no 3D rendering, no physics, no continuous animation. The grid is static text that changes only when you touch it. Between taps, the CPU is close to idle.
Battery goes to three places in practice:
- The display. Dominant, and almost entirely under your control through brightness. On an OLED screen a dark theme also genuinely helps, because black pixels are switched off rather than lit.
- Video adverts. Decoding video and lighting the screen at full brightness for thirty seconds costs far more than the ten minutes of puzzle either side of it.
- The radio. Fetching adverts wakes the cellular or wifi radio, which has a fixed cost each time regardless of payload size. Offline play removes this entirely.
The same conclusion arrives from a different direction: the game is not the expensive part. If a puzzle game is draining your battery, it is showing you video.
Will an older phone still run it?
Almost certainly, and this is where locally generated puzzles pay off twice.
WordHunt runs on Android 7.0 and above — a release from 2016 — which covers the overwhelming majority of Android devices in use anywhere in the world. That is a deliberately low bar, and it is affordable precisely because the work is trivial: a word search needs no GPU, no large working memory, and no sustained processing.
The part of a free game that actually strains an older device is the advertising stack, not the content. Advert SDKs are heavy, they run on the main thread more than they should, and video decoding is the one genuinely demanding thing a puzzle game ever does. On a four-year-old budget phone, the stutter you notice between levels is usually an advert loading, not a puzzle building.
Which points at the same remedy as everything else in this article. If a free puzzle game feels heavy on an old phone, try it with the connection off. If it becomes smooth, the game was never the problem — and you now know how to play it that way whenever you want to. The features page sets out what else works without a connection.
