Privacy Policy
Wat Kham is developed by Jonathan Delaire. This policy explains what data the app stores, what it does not collect, and how on-device features are handled.
Short version: Wat Kham stores your study state on your device and backs it up to your own private iCloud account. There are no user accounts. Starting with version 1.12, optional Meta ad measurement runs only after you allow tracking through Apple’s permission prompt. Learning and purchases work with either choice. Starting with version 1.12.1, the app also sends anonymous daily counts of a few app steps, such as finishing onboarding or opening the purchase screen, so the developer can see where learners stop.
Data stored on your device
Wat Kham keeps its working data locally on your iPhone. That includes:
- Review history and scheduling state such as grades, review dates, and intervals.
- Streak data including current streak, longest streak, and completion dates.
- Preferences such as learning direction, new card limit, reminder time, and audio settings.
- Reminder schedule for local notifications.
This information is not uploaded to a server operated by the developer. It exists on your device, in device-level backups managed by Apple, and in the iCloud backup described below.
iCloud backup
From version 1.11, Wat Kham backs up your review history, scheduling state, streak data, study preferences and, from version 1.13, your My words list to the private CloudKit database of the Apple Account signed in to iCloud on your iPhone. Reminder times and audio settings are not included. The backup is stored by Apple and counts toward your iCloud storage. The developer cannot read it, and it is used only to restore your progress on a new iPhone or after you reinstall the app. You can turn off automatic backup in Wat Kham's Settings.
User accounts
Wat Kham does not require sign-up or login. There is no account system and no user profile maintained by the developer.
Voluntary feedback
If you choose to send feedback from Settings, Wat Kham sends your message, category, app version and basic context identifying the Settings screen and iOS platform to the developer's Feedback Hub service, hosted on Cloudflare. An email address is included only if you opt in to receiving a reply. Do not include sensitive information in your message.
The developer uses submitted feedback to investigate problems, consider suggestions and reply when contact details are provided. Submissions are handled in a private dashboard and are not displayed publicly in the app. The service uses the request's source IP address to limit submission attempts. Unsent drafts, including any email you enter, remain on your device until delivery is confirmed.
Analytics and tracking
Starting with version 1.12, Wat Kham registers for Apple’s aggregate ad-install attribution without identifying individual users. If you allow tracking through the iOS permission prompt, it also initializes Meta’s SDK to measure which ads lead to installs. The SDK receives device identifiers, installation and app activation signals, device/session metadata and diagnostics. Automatic lesson, purchase and codeless event logging is disabled, and automatic customer-information matching is off. We do not send study content, grades, review history, iCloud backups, feedback messages or feedback email addresses to Meta. Earlier versions do not include this SDK.
Starting with version 1.12.1, Wat Kham sends anonymous usage counts to the developer's Feedback Hub service: first launch, finishing onboarding, finishing a study session, seeing or opening the Full Access offer, the outcome of loading, buying or restoring Full Access, and, from version 1.13, saving a word to My words and whether a typed English answer was correct, wrong or skipped, and, from version 1.14, starting a study session and its learning direction, finishing the first session, reaching 10, 30 and 70 learned words, opening the app again one day or about a week after first opening it, and the phone reaching a serious or critical thermal state, and, from version 1.15, opening a word from a reminder, a Word Drop or the widget, redeeming an offer code, and, from version 1.16, opening an example sentence during a review. Each report contains the event name, a short label such as which screen showed the offer or, from version 1.14, the calendar week the app was first opened and whether it was a new install or an update, the app version, and whether the build is from the App Store, TestFlight or development. The service keeps only daily totals per event. It does not store a device identifier, user identifier or IP address with the counts, and it does not receive study content, the words you type, individual grades, review history, feedback or payment details. These counts are not shared with Meta or used for advertising. The service uses the request's source IP address only to limit request volume. The date the app was first opened stays on your iPhone.
You can decline tracking or change your choice in Settings > Privacy & Security > Tracking. Declining keeps the Meta SDK inactive on the next app launch. Apple aggregate attribution does not require tracking permission. Meta handles SDK data under its Privacy Policy; it is separate from your local learning progress.
Third-party services
From version 1.12, consent-based install measurement uses Meta’s SDK as described above. Purchases use Apple’s StoreKit framework. Voluntary feedback and, from version 1.12.1, anonymous usage counts use the Cloudflare-hosted Feedback Hub service described above.
- Apple StoreKit processes in-app purchases and entitlement checks using Apple’s infrastructure. See Apple’s Privacy Policy for Apple’s handling of purchase-related data.
In-app purchases
Wat Kham offers a one-time Full Access purchase through Apple’s App Store. Payment information, Apple Account credentials, and transaction processing are handled by Apple. The developer does not run a separate purchase server.
Notifications
Daily review reminders are local notifications:
- Scheduled on your device
- Configurable in the app
- Revocable in iOS Settings at any time
- Not dependent on a remote push service operated by the developer
Text-to-speech
Thai pronunciation uses Apple’s built-in speech system on device. Card text is not sent to an external speech service for this feature.
Children’s privacy
Wat Kham is not specifically directed at children under 13. Please do not include children's personal information in feedback.
Data deletion
Deleting the app removes Wat Kham's local data and unsent feedback drafts from your device. To delete the iCloud backup, open the Settings app, tap your name, then iCloud, Manage Storage (or Storage), Wat Kham, and delete its data. Feedback already submitted remains separate from local app data. To request deletion of submitted feedback, contact the developer using the address below and provide enough information to identify your submission.
Changes to this policy
If the policy changes materially, this page will be updated with a revised effective date.