Sum Serenity: Mental Maths
Relaxing sums & brain training
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Five peaceful worlds, three stars to chase on every level and five secret levels to find. Mental maths that feels like a deep breath.
Sum Serenity is a calm mental maths game. Solve quick sums against a gentle clock as you wander a winding path through five peaceful, illustrated worlds, with soft music to keep you company.
FIVE WORLDS, 75 LEVELS
• Lily Pond: warm up with addition.
• Mossy Forest: subtraction joins in.
• Signpost Village: multiplication, starting with the times tables.
• Butterfly Garden: division joins the mix.
• Candlelit Festival: the toughest sums of all.
Each world builds slowly, so the sums grow with you and never feel out of reach.
THREE STARS TO CHASE
Finish a level with time to spare to earn up to three stars. Replay any level to beat your time and fill in the gaps.
SECRET LEVELS
Earn every star in a world to open its secret level: a longer, quicker run along a moonlit path.
ENDLESS MODE
Pick your sums and your pace, then see how far you can go. Every right answer wins a little time back, and your best run is saved.
MADE TO RELAX
• A big, clear number pad that is easy to tap.
• Pause whenever you need to.
• Music, sound effects and haptics you can switch off.
• No account, no adverts and no internet needed to play.
TRY IT FREE
Play all 15 levels of Lily Pond for free. Unlock the full game with a single purchase to open the other four worlds, the secret levels and endless mode. There is no subscription.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Stunning design refresh.
The developer, Blossom Labs, 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
- Blossom Labs Ltd
- Size
- 29.5 MB
- Category
- Education
- 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. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Serenity Seeker $4.99
- Copyright
- © 2026 Blossom Labs Ltd