Thermometers - Logic Puzzles
Daily brain & number games
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
NEW: Dark Mode! 9,000+ logic puzzles, a fresh Daily Challenge every day, and giant 17x17 boards. Fill every thermometer - no guessing, just pure deduction.
Fill every thermometer with pure logic - no random guessing, ever.
Thermometers - Logic Puzzles is a calm, focused brain game for fans of Sudoku, Nonogram, Picross, and number grid puzzles. Read the row and column clues, fill each thermometer from the bulb toward the tip, and feel the whole board click into place.
WHY YOU'LL LOVE IT
- 9,000+ logic puzzles, from quick 4x4 warm-ups to epic 17x17 boards
- Designed for pure deduction - every puzzle has a clean logical path
- 5 difficulty levels: Beginner, Normal, Hard, Expert, and Master
- Daily Challenge: a fresh calendar puzzle every single day
- Brain Test: a dedicated level path with extra-large expert boards
- Dark Mode and a cozy warm-paper look that is easy on your eyes
- Fill and Mark input modes, with a precise drag-friendly cursor
- Smart hints when you get stuck, and statistics to track your progress
- Works fully offline - perfect for flights and commutes
- Progress backed up to the cloud
HOW TO PLAY
1. Thermometers always fill from the round bulb toward the tip.
2. The numbers tell you how many cells must be filled in each row and column.
3. Mark the cells that must stay empty, fill in the rest.
4. Complete the board without breaking a single rule - that's the puzzle!
Easy to learn, deeply satisfying to master. Whether you want a two-minute coffee-break puzzle or a long evening of deduction, Thermometers gives your brain a workout without the stress - no time limit, play at your own pace.
Download now and make logic your daily habit!
For Terms of Use, please refer to Apple's Standard End User License Agreement:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Thermometers 2.1 is here!
- Added Dark Mode for comfortable play day or night
- Refined visual polish in light and dark themes
- Improved board readability on larger puzzles
- General stability and usability improvements
The developer, Feng Xia, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Feng Xia
- Size
- 137.7 MB
- Category
- Puzzle
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 12 more
- English, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove ads pack $3.99
- Month Membership Subscription $3.99
- Weekly Membership Subscription $1.99
- Copyright
- © 2026 Fire Mountain

