Certain - Peace of mind in your pocket
Last Updated: January 2, 2026
By downloading, installing, or using the Certain mobile application ("the App"), you agree to be bound by these Terms of Use. If you do not agree to these terms, please do not use the App.
Certain is a mobile application designed to help you track and confirm the status of safety-related items in your home, such as locks and appliances. The App allows you to:
We grant you a limited, non-exclusive, non-transferable, revocable license to use Certain for personal, non-commercial purposes, subject to these Terms of Use.
Certain offers an optional premium subscription called "Certain Plus" with the following features:
Subscription Details:
You agree to:
CERTAIN IS A RECORD-KEEPING AND REASSURANCE TOOL ONLY. IT IS NOT A SECURITY SYSTEM, SAFETY DEVICE, OR VERIFICATION SYSTEM.
What Certain Does:
What Certain Does NOT Do:
Critical Understanding: When you tap "Mark as Locked" or "Mark as Off" in the app, you are simply creating a record that says you performed that action. The app cannot and does not verify that you actually locked the door or turned off the appliance. The app only knows what you tell it. If you record that a door is locked when it is not actually locked, the app has no way to detect this error.
YOU ARE SOLELY RESPONSIBLE FOR ACTUALLY PERFORMING ALL SAFETY ACTIONS. The app is a memory aid only, not a replacement for physical verification. Always verify the actual status of safety-critical items in person when necessary.
THE APP IS PROVIDED "AS IS" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
To the fullest extent permitted by law, Certain and its developers shall not be liable for any damages, losses, or harm of any kind arising from or related to:
BY USING THIS APP, YOU ACKNOWLEDGE AND AGREE THAT YOU USE IT ENTIRELY AT YOUR OWN RISK AND THAT THE DEVELOPERS ASSUME NO RESPONSIBILITY OR LIABILITY FOR ANY CONSEQUENCES OF YOUR USE.
Your use of the App is also governed by our Privacy Policy. All data is stored locally on your device, and we do not have access to your personal information.
All content, features, and functionality of the App, including but not limited to text, graphics, logos, and software, are the exclusive property of Certain and are protected by copyright, trademark, and other intellectual property laws.
We reserve the right to terminate or suspend your access to the App at any time, without notice, for any reason, including violation of these Terms of Use.
We may modify these Terms of Use at any time. We will notify you of material changes by updating the "Last Updated" date. Your continued use of the App after changes constitutes acceptance of the modified terms.
These Terms of Use are governed by the laws of the United Kingdom. Any disputes arising from these terms or your use of the App shall be subject to the exclusive jurisdiction of the courts of the United Kingdom.
If you have any questions about these Terms of Use, please contact us at:
Email: certainappdev@gmail.com
© 2026 Certain. All rights reserved.