Privacy Policy

Last updated · 2 October 2026

This policy explains how khtwa (“we”, “us”, “our”) handles your information. The app is designed to collect as little data as possible while still doing its job: helping you log what you eat and estimate calories.

Short version
  • We only collect what we need to track your food, weight, movement, and hydration.
  • Your data lives on a third-party hosting platform that we control and manage on your behalf.
  • The text you type to log a meal is sent to an AI provider for calorie estimation, then discarded.
  • Movement and hydration tracking is entirely optional — you can use khtwa fully without it.
  • Apple Health (iPhone) and Health Connect (Android) are opt-in; we never sell health data, share it with advertisers, or use it for advertising.
  • No ads inside the app. We use Firebase for app analytics and crash reports, and the Meta SDK to measure whether our own ads lead to installs and subscriptions — never with your food, weight, or health data. On iPhone this works without your advertising identifier (IDFA) and without cross-app tracking. On Android, Firebase and Meta also receive your device’s advertising ID for this measurement, except for people whose country (as chosen in the app, or as set on the phone) is in the EU/EEA, the UK or Switzerland; you can reset or delete it at any time in Android Settings › Privacy › Ads.
  • No third-party SDKs you don’t see in this policy.
  • You can delete your account and all your data from inside the app at any time.

1Who we are

The app is operated by:

Khtwa App (AM) Grootsruhe 20539 Hamburg Germany Email: hello@khtwa.app

2Data we collect

2.1 Profile data (you provide it during onboarding)

2.2 Log data (created as you use the app)

2.3 Identifiers

2.4 Technical data we receive

2.5 App usage and ad measurement data

We do not collect: location, contacts, calendar, microphone, your advertising identifier on iPhone (IDFA) or on Android if your country is in the EU/EEA, the UK or Switzerland, or anything not listed above. On iPhone we do not ask for tracking permission and do not track you across other companies’ apps or websites. If you do not grant Apple Health or Health Connect permission, we do not read or store any health or fitness data from your device.

3How we use your data

DataPurpose
Profile data Calculate your daily calorie target and personalize portion estimates by country.
Food entry text Send to our AI provider to estimate calories and macronutrients.
Country and language Help the AI return culturally appropriate estimates and translations.
Anonymous user ID Tie your log entries to your account so we can show them back to you.
Apple identifier (if used) Let you recover your account and data on a new device.
Google sign-in (Android, if used) Sign you in and let you get back into your account.
IP address Detect abuse and run anti-bot checks during sign-in.
Workout and water log data (optional) Display your movement and hydration alongside your food log; compute an optional burned-calorie bonus for your daily food budget if you choose to enable it.
Apple Health data (if you connect it) Read workouts and active energy to populate the Move tab; write water entries back to Apple Health so they stay in sync with your other apps. All read/write happens on your device — we store only the values you explicitly log in khtwa.
Health Connect data (Android, if you connect it) Show your Move tab, add the day’s burn to your calorie budget if you choose to, and include your movement totals in your weekly and monthly reports.
Push notification token Deliver the notifications you allow.
Advertising ID (Android, unless your country is in the EU/EEA, the UK or Switzerland) Measure whether our own ads lead to installs and subscriptions, and app analytics.
Report summaries Write your weekly and monthly reports.
App usage and crash data Understand which features are used, find and fix crashes, and keep the app fast.
Install, registration, and purchase events Measure whether our own ads on Meta platforms lead to installs and subscriptions, so we spend our small ad budget where it works.

We do not sell your data, and we do not use it for profiling beyond what is required to estimate the calories in the foods you log. The only data that reaches an advertising platform is the install, registration, and purchase events described in section 2.5, sent to Meta to measure our own ads (and, on Android, your device’s advertising ID, section 2.3). Health data (from Apple Health or Health Connect) is used only to show your Move tab, to add the day’s burn to your budget when you choose to, and to include your movement totals in your weekly and monthly reports, which our AI provider writes for us (section 5). It is never sold, never shared with advertisers, data brokers or information resellers, and never used for advertising.

If you are in the EU or EEA, our legal basis under Article 6 GDPR is:

5Third parties (processors)

We work with the following processors. Each receives only the data they need.

Cloud hosting platform — storage, authentication, server functions

AI provider — AI food parsing and reports

Google Firebase — analytics and crash reporting

Meta Platforms — ad measurement

Apple — Sign in with Apple (optional)

Google — Sign in with Google (optional, Android)

Google Play — app distribution and billing (Android)

Cloudflare Turnstile — anti-abuse

Apple HealthKit — fitness and hydration sync (optional)

Google Health Connect — fitness and hydration (optional, Android)

6Where your data is stored

Your data is stored on a third-party cloud hosting platform that we control and manage on your behalf. The platform replicates data across secure data centers. If your data is processed outside the EU/EEA, the platform has Standard Contractual Clauses (SCCs) in place to provide adequate protection.

7How long we keep your data

You can also ask us to delete your account without the app: see khtwa.app/delete-account.

8Your rights

You can, at any time:

9Children’s privacy

The app is intended for people aged 13 and over. We do not knowingly collect data from anyone under 13. If you believe a child under 13 has used the app, contact us and we will delete the account.

10Security

11Changes to this policy

If we change this policy in a way that materially affects you, we will update the “Last updated” date at the top and, where appropriate, notify you in the app.

12Contact

For any privacy question, email hello@khtwa.app or write to the address in section 1.