SO-recruit

A recruitment company in Huddersfield that also builds Android games. They run with the phone in flight mode: no account, no server, no advertising, nothing sent anywhere.

OfflineNo accountNo advertisingHuddersfield, UK

Two lines of work, one company

SO-Recruit Ltd is registered in England at 12 Greenhead Road, Huddersfield HD1 4EN, and Nicholas Arthur Ledgard answers for it. Recruitment is the day job. The games are the other thing, published under the same company because that is where they honestly come from.

It is an odd pairing on a store listing, so it is written here rather than left to be guessed at. Nothing crosses between the two: the games hold no contacts, no CVs and no candidate data of any kind, and could not reach any if they wanted to.

Built with nothing behind them

Whatever a game needs to remember goes into its own private folder on the handset, which Android keeps sealed away from every other app installed. No account is created, no identifier is issued, no event is counted, and no advertising library is compiled in.

Nothing here can leak a database it never kept, and nothing stops working the day a service is retired. The trade is that progress lives on the phone and nowhere else, which is worth knowing before a handset is replaced rather than afterwards.

Glent

One rule. Countless solutions.

com.glowgrid.glent

Tap a tile and it flips between dark and glowing — and so do the tiles beside it. Light the whole board, or clear it, depending on the level. The rule takes five seconds to learn and the boards take rather longer to put down, because every tap ripples outward and the obvious move is usually the wrong one.

The logic is real rather than lucky: every level has a genuine solution, the move counter runs against the known best, and a reset lets you experiment without spoiling anything. Sixty hand-built grids climb from small warmups to larger tangles across easy, medium and hard, with variants that change which neighbours a tap affects, progress and best-move records kept, a limited hint that reveals one correct tap, and a shuffle that hands you a fresh solvable board whenever you want one more. Offline, no account, no advertising.

Glent on Google Play

Why a board has to be built, and cannot just be scattered

A grid of lights is a system of linear equations in disguise. Each tile is either on or off, each tap adds a fixed pattern to the board, and adding twice undoes it — which is arithmetic modulo two, where 1 + 1 = 0. Whether a board can be lit at all is then the plainest question in linear algebra: does the target lie in the span of the tap patterns? Row-reduce the matrix over GF(2) and everything falls out at once — the rank, the number of reachable boards, and the quiet patterns, sets of taps that change precisely nothing and therefore turn every solution into several. The panel does that elimination for the size and rule you pick, exactly, with no sampling.

33,554,432arrangements the board can be in
23rank of the tap matrix over GF(2)
2dimensions of quiet taps
1 in 4boards that can be lit at all
4distinct solutions each one has
8,388,608boards actually reachable

Not on this bench: no board, no tiles, nothing to tap and nothing solved. It never looks at a particular arrangement and could not tell you a single move. It counts what the rule makes possible, which is the reason levels in a game like this are built backwards from a finished board rather than sprinkled and hoped over.