Blob Lab: Guess the Weight
Estimate, compare, earn stars
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Guess the weight of glowing blobs – a new daily challenge every day.
Welcome to the Blob Lab!
A reference blob shows its weight. Another blob hides its own. Compare size, shape and color, turn the dial and guess: how heavy is it? The closer you get, the more stars you earn.
Features:
• Campaign: 45 levels with new twists – different densities, scattered particles, shape-shifting amoebas, buoyancy and optical illusions. The Secret Lab opens at 40 stars.
• Streak mode: the tolerance gets tighter with every round. How long can you keep it up?
• Daily challenge: three guesses under 5 % error. Everyone gets the same first blobs each day, and you can share your result as colored squares.
• Leaderboard: rounds of five blobs, ranked by your average error.
• Party mode: pass the phone around for a duel or a time attack with friends on one device.
• Hints: earn credits with every new star and trade them for hints in the lab shop.
• Neon style: a calm sci-fi atmosphere with relaxing music.
Free to play, no ads, no in-app purchases. Leaderboards and achievements included.
Think you have a good eye? Download Blob Lab and find out!
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
“Kids Space” is now “Mini Lab”. New: a “Rate the app” button in the settings, plus small improvements.
The developer, Jochen Kolmer, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jochen Kolmer
- Size
- 34.8 MB
- Category
- Trivia
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- German
- Age Rating
4+
- 4+
- Copyright
- © 2026 Jochen Kolmer
