Your tax data stays on your device. Ads are the one exception.
PrePostTax is a Canadian sales-tax calculator, available on both iOS and Android. Everything you enter — prices, provinces, receipts, claims — stays on your device on either platform. PrePostTax is supported by ads shown through Google AdMob, which is the only third party involved.
Effective: July 4, 2026
The short version
No account, no sign-up, no server of our own — PrePostTax has no backend, on either platform.
No analytics or trackers built by us.
Your claims, receipt photos, and inputs are stored only in this app, on this device.
PrePostTax shows ads via Google AdMob, which can collect device and advertising identifiers to serve and measure those ads.
On iOS, PrePostTax asks for App Tracking Transparency permission before any cross-app tracking identifier is used.
On Android, the advertising identifier (AD_ID) is used only for the same ad-serving purpose, and can be reset or limited in system settings.
Camera and photo access are used only when you attach a receipt photo.
Print and Email Report hand your data to apps you choose — PrePostTax never sees it.
Information we don't collect
PrePostTax itself has no user accounts, no analytics SDKs, and no server to send data to, on either iOS or Android. We do not collect your name, location, or usage behavior, and nothing you type into the app is ever sent to us.
Advertising (Google AdMob)
PrePostTax shows interstitial ads through Google AdMob to support the app at no cost to you. To select, serve, and measure these ads, Google AdMob and its partners may collect your device's advertising identifier, IP address, general device information, and ad interaction data, governed by Google's Privacy Policy (policies.google.com/privacy). This data is not linked to the tax information you enter in the app.
On iOS: The first time you open PrePostTax, iOS shows a system permission prompt asking whether PrePostTax can track you across apps and websites (App Tracking Transparency). If you decline, ads still show, but without using your Apple advertising identifier for cross-app tracking. Change this anytime in Settings → Privacy & Security → Tracking.
On Android: PrePostTax uses the Google Play advertising identifier (AD_ID) solely for ad serving. Reset or opt out anytime in Settings → Google → Ads.
Information stored on your device
Item prices, province, Indigenous exemption status — app memory only, cleared on close
Saved claims (store, date, tax amounts, exemption flag) — on-device local storage
Receipt photos — a local file on your device, referenced by a claim
Camera & photo library access
PrePostTax requests camera and photo library access only when you tap Take Photo or Upload on the Reverse Tax screen. The image is stored locally and linked to that one claim. We never access your camera or photos in the background, and never upload an image anywhere.
Print & email report
Print Report and Email Report in My Claims generate a PDF and hand it to your device's native print dialog or share sheet. You choose the destination. PrePostTax never sees where you send it.
Data retention & deletion
Your data stays on your device until you delete it — individually via My Claims, or entirely by uninstalling the app.
Children's privacy
PrePostTax is not directed at children under 13 and collects nothing itself; ad-related data collection described above still applies as it's controlled by Google, not PrePostTax.
Changes to this policy
If this policy changes, the effective date above will be updated.
Contact
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