Last updated: 13 August 2026
TestDue is an offline due book and test log for backflow prevention assemblies. You are responsible for how you use tickets, gauge readings and shared images. The app is a log only and is not a filed test report, licensed certification or AHJ approval. Always follow applicable plumbing and water-purveyor rules, manufacturer instructions and the law. Some cities require filing in a portal such as Syncta or BSI — TestDue does not replace that.
TestDue Pro is an auto-renewing subscription offered through Apple In-App Purchase: $12.99 per month or $79.99 per year (with a 7-day free trial on the annual plan where eligible). Payment is charged to your Apple Account at confirmation. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings. Any unused portion of a free trial is forfeited when you purchase a subscription where applicable.
We grant you a personal, non-transferable license to use TestDue on Apple devices you own or control, subject to the App Store terms. You may not reverse engineer, resell or misuse the app.
Data you enter is stored on your device. Backups and shares you initiate are your responsibility. See our Privacy Policy.