Stamp Hunt app icon Stamp Hunt
Stamp Hunt

Privacy Policy

Effective date: June 1, 2026

Overview

Stamp Hunt is built to keep your travel data in your control. We do not sell your data. The iPhone app does not run ads or product analytics. Your collection lives on your iPhone, and when you are signed in to iCloud it syncs privately through your own private iCloud account so it reaches your other devices. We never receive your collection — see the iCloud Sync and Backup section below. Data otherwise leaves your device only when you choose to share it, compare with another nearby phone, when the app asks Apple services for help with things like maps or country lookup, or when purchase validation is handled through RevenueCat. This website may use Google Analytics to understand aggregate website traffic and basic website interactions; those website analytics are separate from your in-app travel data.

Data Stored on Your Device

Stamp Hunt stores the following information on your device:

  • Your display name (optional, entered by you)
  • Your home country or nomad choice
  • A profile photo (optionally imported from your photo library or passport chip)
  • Your stamp collection — countries, airport codes, dates, proof markers, and any evidence images you choose to keep

Stamp Hunt stores profile, collection, and limited app-state records on your device. Sensitive profile, collection, and app-state records are securely stored on-device. This local state includes things like onboarding completion, collection start date, and app flags needed for the experience to work. The app does not copy this data to servers we control, and we never receive it. Your stamp collection and the evidence images you keep also sync through your own private iCloud account when you are signed in to iCloud — see the iCloud Sync and Backup section below.

iCloud Sync and Backup

When you are signed in to iCloud, Stamp Hunt keeps your stamp collection and the evidence images you choose to keep — passport-stamp and Snapshot photos — in sync across your devices using your own private iCloud account (Apple's CloudKit private database). This happens automatically in the background.

This data is stored under your Apple ID, not on servers we control, and we cannot read it. It is covered by Apple's iCloud terms and privacy policy. To stop syncing, sign out of iCloud or turn off iCloud for Stamp Hunt in the Settings app. Using Delete All Data, or deleting a single stamp, also removes the matching items from your iCloud. Deleting the app by itself leaves your iCloud copy in place until you delete the data or remove it in iCloud settings.

Camera Usage

Stamp Hunt requests camera access for the following features:

  • Reading barcodes on boarding passes
  • Scanning the passport page and machine-readable zone (MRZ) during passport import
  • Capturing framed images of passport ink stamps so the app can identify and save the stamp you choose to keep

Camera preview frames are not saved. Live camera frames are used only while you scan and are then discarded. If you keep a passport-stamp claim, Stamp Hunt stores a local cropped image of that stamp on this device as evidence for that country. We do not receive your camera images or videos.

Photo Library and Snapshot Claims

When you choose a photo for a Snapshot stamp or profile photo, Stamp Hunt reads only the image you selected. For Snapshot claims, the app inspects embedded GPS metadata and may fall back to the selected Photos asset's location and capture date in order to resolve a country.

For Snapshot claims, the resolved country, place summary, coordinates, and capture date are shown back to you for confirmation before a stamp is added. This metadata is used on-device only during the claim flow.

The app does not upload your selected photos to us. If you keep a Snapshot claim, the app may keep a local evidence image for that stamp on this device. Exact coordinates are not kept after the claim finishes. A local copy is also kept if you use the image as your profile photo.

Boarding Pass Scanning

When you scan a boarding pass barcode, the app extracts passenger name, origin and destination airport codes, carrier, flight number, seat, booking reference, and flight date in order to validate the pass and determine stamp eligibility.

This information is used only during the scan flow. Passenger name, booking reference, flight number, seat, and other boarding pass details are not stored after you leave the flow. If you keep the stamp, the app stores only the resulting stamp, the route airport code, obtained date, and proof flags needed to track how the stamp was earned.

Flight File Imports

If you import a Flighty CSV or Tripsy backup, Stamp Hunt reads the file on device to find airplane trips and match airport endpoints to countries.

Imported files are not kept by Stamp Hunt. The app stages them only in protected temporary storage while parsing, removes temporary copies after review, and saves only the countries, airport codes, dates, and proof markers you choose to add to your collection.

Passport Import

If you choose passport import, Stamp Hunt scans the passport page to read the machine-readable zone (MRZ), or lets you enter the passport number, date of birth, and expiry date manually, so it can derive the access key required to open your passport's NFC chip. During onboarding, the app reads your name, nationality, and portrait to prefill your name, home country, and profile photo. In profile editing, passport import can update your name and profile photo.

The passport number, date of birth, expiry date, and derived access key are used only for the import attempt and are not stored after the flow finishes. Imported profile details are stored on-device only if you choose to keep them in your profile.

Location Services

Stamp Hunt may request your location to verify which country you are currently in for boarding pass claims, passport-stamp upgrades, manual current-country claims, and parts of onboarding. To resolve your current country, the app may use Apple's geocoding services.

Your exact GPS coordinates are not stored for live location checks. The app derives a country code only from your current position and then discards the precise live location. Location access is optional, and manual or lower-trust flows remain available without it.

Sharing and Exports

If you use Share your journey, the share image or text is created on your device. If you use Compare Nearby, the app sends only what is needed to compare with the other phone you choose: your display name, an optional small avatar, and your countries with their best tiers. We do not receive that shared data.

Other apps or people get only what you choose to send. If you share through the iOS share sheet, the selected app or service receives that content under its own rules. If you compare nearby, the other phone receives the comparison data directly.

App Backend, Tracking, and Cloud Sync

The Stamp Hunt iPhone app has no backend operated by us, no in-app analytics, and no advertising, and we never receive your travel data. When you are signed in to iCloud, your collection syncs through your own private iCloud account (see the iCloud Sync and Backup section) — this is your iCloud, not a server we control. Some Apple-provided services such as reverse geocoding and map rendering may be contacted as part of country resolution and map display. RevenueCat may also be contacted for purchase validation and entitlement unlocks. Aside from your own iCloud sync, Apple service requests, RevenueCat purchase validation, and user-initiated sharing, the app does not transmit your travel data to us. Specifically:

  • No in-app analytics or app telemetry of any kind
  • No advertising or ad tracking
  • No third-party analytics SDKs or advertising SDKs
  • No cloud storage on servers we control — syncing uses your own private iCloud
  • No automatic upload of your travel history to us — background sync goes only to your own iCloud

Purchases / RevenueCat

Stamp Hunt uses RevenueCat to manage in-app purchases, subscriptions, receipt validation, and entitlement access. RevenueCat is configured when the app launches and may process your purchase history, receipt and entitlement status, an anonymous RevenueCat app user ID, and limited app, device, and App Store storefront information needed to validate purchases and unlock paid access.

RevenueCat does not receive your travel history, passport data, photos, location claims, payment card details, or Apple ID from Stamp Hunt.

Website Analytics

The Stamp Hunt website may use Google Analytics to measure website usage, including page views and other configured website interaction events such as scroll depth or outbound link clicks. Google Analytics is used for the marketing website only and does not receive your Stamp Hunt app collection, passport scans, boarding pass details, photos, profile, or location checks.

We configure website analytics to reduce personal data collection where possible, including email redaction. Please avoid putting personal information in page URLs or query parameters.

Children's Privacy

Stamp Hunt does not knowingly collect personal information from children. Because the app has no accounts, in-app analytics, or backend that receives user travel data, we do not receive personal data from child users through normal app use.

Data Deletion

You stay in control of deletion. You can delete a single stamp from the stamp detail screen. You can delete everything from the Profile tab using Delete All Data. That removes your name, home country or nomad preference, profile photo, stamp collection, saved evidence images, onboarding state, and other local app state from this device, and removes the synced copies from your iCloud. Deleting the app removes its local data from this device; your iCloud copy remains until you use Delete All Data or remove it in iCloud settings.

Changes to This Policy

If we update this privacy policy, the revised version will be included in a future app update. We may also update the copy presented inside the app in a later version. The effective date at the top of this policy always reflects the most recent revision included with the app.

Contact

If you have any questions about this privacy policy, contact us here.