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Support / Contact
For any issues or feedback, email: tiertally.app@gmail.com
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TierTally is a professional BOM (Bill of Materials) cost calculation tool designed for makers, contractors, gamers, and engineers. It uses a recursive layered approach to track every material and labor hour, so your total cost is accurate.
Last updated: March 31, 2026
TierTally is built with a "Privacy First" philosophy. We do not collect, store, or transmit any of your personal data to our servers. All project data, BOM details, and pricing information you enter are stored locally on your device. We do not have access to your content.
While TierTally does not collect your data, we use Apple's In-App Purchase system for Pro subscriptions. Apple may collect information necessary to process your transaction. Please refer to Apple’s Privacy Policy for more details.
TierTally is 100% ad-free. We do not use any advertising identifiers (like IDFA) or tracking cookies. We do not share any information with third-party advertisers or data brokers.
We may receive aggregated, anonymous diagnostic information (such as crash reports provided by Apple) to improve app stability. This information does not identify individual users.
We may update this Privacy Policy from time to time. Changes will be reflected by updating the "Last updated" date. Continued use of TierTally after updates constitutes acceptance of the revised policy.
Since TierTally stores data locally on your device only, you may permanently delete your data by uninstalling the app.