A Grids of Thermometers alternative.
Same puzzle, different deal. Mercuro has no level packs and no subscription, and three fresh dailies every day.
Mercuro, the Thermometers puzzle for iPhone and iPad
Free to play. No subscription.
Mercuro and Grids of Thermometers side by side
| Mercuro | Grids of Thermometers | |
|---|---|---|
| Price | Free; $2.99 once to remove ads, or $4.99 once for Pro | Free; in-app purchases include $0.99 to remove ads, $0.99 level packs, $5.99 for all packs and a $4.49 Premium Subscription (Grids of Thermometers on the App Store) |
| Puzzles | 660 curated, 330 of them free, on 8 board sizes from 5x5 to 12x12 | Thousands of levels in several grid sizes (Grids of Thermometers on the App Store) |
| Daily play | Three new puzzles a day (Warm-Up, Daily and Challenge) | New levels every day (Grids of Thermometers on the App Store) |
| Game Center | Leaderboards and 40 achievements | Leaderboards and achievements (Grids of Thermometers on the App Store) |
| Runs on | iOS 17 or later | iOS 12 or later (Grids of Thermometers on the App Store) |
Checked 2026-10-08 on the US App Store. Prices and features change, so see each app's own listing.
No packs to pick from
Grids of Thermometers sells extra levels in $0.99 packs, or $5.99 for all of them, alongside a $4.49 subscription (Grids of Thermometers on the App Store). Mercuro keeps it to one set. 330 puzzles come free, and a single $4.99 Mercuro Pro purchase adds the other 330. Nothing renews.
Three dailies that grow
Both apps add puzzles every day. Mercuro's arrive as a set of three that grow in size, from a 6x6 or 7x7 Warm-Up to a Challenge between 10x10 and 12x12, and every player gets the same three on the same date.
When Grids of Thermometers is the better fit
If sheer volume is the goal, Grids of Thermometers lists thousands of levels against Mercuro's 660. It also runs on much older devices, back to iOS 12, and comes in English and 15 other languages (Grids of Thermometers on the App Store).
Questions
Can I buy Mercuro puzzles in packs?
No. There is one free set of 330 puzzles, and Mercuro Pro adds the other 330 for $4.99, paid once.
Does Mercuro have new puzzles every day?
Yes, three: a Warm-Up, a Daily and a Challenge, each on a bigger board than the last.
Is Mercuro on Android?
Not yet. Mercuro is on iPhone and iPad.
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.
- $4.99onceA logic puzzle game with no subscription330 puzzles free. $2.99 or $4.99, paid once.
- Like Sudoku or nonograms? Try ThermometersWhat carries over, and the one rule that is new.
- 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.