---
title: Thermometers - Logic Puzzles Alternative, No Subscription
description: An alternative to the Thermometers - Logic Puzzles app: Mercuro has 660 curated puzzles, three daily puzzles and one-time prices with no membership.
url: https://www.arbazsiddiqui.me/app/mercuro/thermometers-logic-puzzles-alternative/
---

# An alternative to Thermometers - Logic Puzzles

Same puzzle, smaller library. Mercuro trades 9,000 boards for 660 curated ones, three dailies a day and prices you pay once.

App Store: https://apps.apple.com/app/id6762402072

## Mercuro and Thermometers - Logic Puzzles

| | Mercuro | Thermometers - Logic Puzzles |
|---|---|---|
| Price | Free; $2.99 once to remove ads, or $4.99 once for Pro | Free; in-app purchases are a one-time $3.99 remove-ads pack, a $3.99 monthly membership and a $1.99 weekly membership ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)) |
| Puzzles | 660 curated, 330 of them free, on 8 board sizes from 5x5 to 12x12 | 9,000+ from 4x4 to 17x17 ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)) |
| Difficulty | Sorted by board size, with chapters that open as you solve | Five levels, Beginner to Master ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)) |
| Daily play | Three new puzzles a day (Warm-Up, Daily and Challenge) | A daily challenge puzzle ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)) |
| Runs on | iOS 17 or later | iOS 13 or later ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)) |

Checked 2026-10-08 on the US App Store.

## Sorted by size, not labels

Thermometers - Logic Puzzles sorts its puzzles into five difficulty levels ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)). Mercuro sorts by board size instead, eight of them from 5x5 to 12x12, each with chapters of ten that open as you solve.

## Three dailies, not one

Its daily challenge is one puzzle a day ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)). Mercuro sends three, a Warm-Up, a Daily and a Challenge, each on a bigger board than the last.

## When Thermometers - Logic Puzzles is the better fit

It has far more puzzles, over 9,000 against Mercuro's 660, with boards up to 17x17. It also has a dark mode and a warm paper look ([Thermometers - Logic Puzzles on the App Store](https://apps.apple.com/us/app/thermometers-logic-puzzles/id6739959033)). If volume and huge boards are what you want, it is the better pick.

## Switching over

Mercuro tops out at 12x12, so if you mostly play bigger grids it will feel small at the high end. In return you get a hint that names the next forced move and explains it, and two purchases you make once, if at all, in place of a membership.

## Questions

**Does Mercuro have a weekly or monthly plan?** No. Both purchases are one-time.

**Does Mercuro have a dark mode?** Yes. Slate, one of the two themes you start with, is dark.

**How big do Mercuro boards get?** Up to 12x12. The daily Challenge is between 10x10 and 12x12.