HARDSUM
Daily math logic puzzle
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
HARDSUM is a fast, satisfying puzzle game that turns simple addition into a true test of logic.
Each challenge gives you a 3x3 grid. Every cell contains multiple number options, but only one choice in each cell leads to the correct solution. Your goal is to find the right combination so every row and column matches the target sum.
HARDSUM is easy to understand in seconds, but every puzzle pushes your focus, pattern recognition, and reasoning a little further.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Minor bug fixes.
The developer, Black Lotus Development Agency Ltd, 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:
- Contact Info
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Black Lotus Development Agency Ltd
- Size
- 40.8 MB
- Category
- Trivia
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 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
13+
- 13+
- Frequent
Contests
Contains
User-Generated Content
- Copyright
- © 2025 Hardsum. All rights reserved.