Last Updated: April 9, 2026
Welcome to One Line: Brain Logic Puzzle. These Terms of Use ("Terms") govern your use of the mobile application (the "App") developed by Techtenstein Services Pvt Ltd ("Company," "we," "us," or "our").
By downloading or using the App, you agree to be bound by these Terms. If you do not agree, do not use the App.
One Line: Brain Logic Puzzle is an Android puzzle game based on Eulerian Path theory. The objective is to draw a continuous line through all connections in a level without lifting your finger or retracing a line.
Personal Use: We grant you a non-exclusive, non-transferable, revocable license to use the App for personal, non-commercial entertainment on a compatible Android device.
Commercial Restrictions: This App is a commercial product. While you may play the game freely, you are strictly prohibited from reselling, redistributing, or decompiling the source code.
Offline Nature: The App is designed for fully offline gameplay and does not require a backend server.
Local Storage: Game progress, including completed levels, earned achievements, and hint counts, is stored locally on your device via SharedPreferences .
Data Loss: If you clear your device cache or uninstall the App, your local progress may be permanently lost.
The App is supported by advertising via AdMob and Unity Ads.
Ad Types: You may encounter banner ads, interstitial ads between levels, and rewarded ads.
Rewarded Content: Users may choose to watch a rewarded video advertisement to earn additional "hints" to solve difficult levels.
Third-Party Data: Advertisements are served by third-party networks that may collect device identifiers for ad personalization.
By using the App, you agree not to:
Attempt to disrupt the game logic or bypass the hint system through unauthorized means.
Use the App for any illegal or unauthorized purpose.
Reverse-engineer or attempt to extract the source code of the App.
All rights, title, and interest in and to the App, including the GraphEngine, level designs, and UI framework (Jetpack Compose), are the exclusive property of Techtenstein Services Pvt Ltd or its licensors. This App is protected by copyright and other intellectual property laws.
The App is provided on an "AS IS" and "AS AVAILABLE" basis. We do not warrant that the App will be error-free, that all 100 handcrafted levels will be perfectly solvable on every device configuration, or that the App will be available at all times.
To the maximum extent permitted by law, Techtenstein Services Pvt Ltd shall not be liable for any indirect, incidental, special, or consequential damages resulting from your use of or inability to use the App.
These Terms shall be governed by and construed in accordance with the laws of the jurisdiction in which Techtenstein Services Pvt Ltd is registered, without regard to its conflict of law provisions.
If you have any questions about these Terms, please contact us:
Company: Techtenstein Services Pvt Ltd
Email: contact@techtenstein.com
Website: https://www.techtenstein.com