A logic puzzle game with no subscription.
Play Mercuro free for as long as you like. If you buy, you buy once, and nothing ever renews.
Mercuro, the Thermometers puzzle for iPhone and iPad
Free to play. No subscription.
Free, and properly playable
330 puzzles across eight board sizes, plus three fresh dailies every day.
In the free game a full-screen ad plays every third puzzle you start, at most 12 a day. You get two free hints a day, and after that a hint, or a past day in the archive, costs a short optional ad.
What the other Thermometers apps charge
Every other Thermometers app I checked on the US App Store sells a subscription, though two also sell one-time options. Grids of Thermometers sells $0.99 to remove ads, $0.99 level packs and $5.99 for all packs, next to a $4.49 Premium Subscription (Grids of Thermometers on the App Store). Thermometers - Logic Puzzles sells a one-time $3.99 remove-ads pack and a $3.99 monthly or $1.99 weekly membership (Thermometers - Logic Puzzles on the App Store). Logic Puzzles - Thermometers sells Premium at $0.49 a week, $1.39 a month or $13.90 a year (Logic Puzzles - Thermometers on the App Store).
Why once
I build Mercuro on my own, and charging once was a deliberate choice. You pay for the puzzles, and then they are yours to keep playing.
Questions
Does anything renew?
No. Both purchases are one-time.
Do I have to buy anything to play?
No. The free game has 330 puzzles and the three daily puzzles.
Where do ads appear?
In the free game a full-screen ad plays every third puzzle you start, at most 12 a day. You get two free hints a day, and after that a hint, or a past day in the archive, costs a short optional ad. Either purchase removes all of them.
More guides
- How to play Thermometers puzzlesThree rules and a 4x4 solved move by move.
- 6×68×811×11Three new logic puzzles every dayWarm-Up, Daily, Challenge, and a two-week archive.
- Like Sudoku or nonograms? Try ThermometersWhat carries over, and the one rule that is new.
- Level packs$4.49 subscriptionPay onceA Grids of Thermometers alternativeNo packs, no subscription, three dailies a day.
- 5×57×79×912×12An alternative to Thermometers - Logic Puzzles660 curated boards against a library of 9,000.
- Mercuro overviewEvery feature, drawn and playable.
How Mercuro is built, the solver, generator and hint engine behind these puzzles.