Teddy’sApps
Lexiko

Lexiko — Privacy policy

Last updated: 2026-11-14

Lexiko is an app that checks, during a word game, whether a word is in the dictionary. It is published by Jérémy Bastin (Liège, Belgium), reachable at hello@teddyapps.net. This page describes what the app does with your data, as it is built.

In short

  • No account, no ads, no cross-app tracking.
  • Your history and your favorites stay on your phone; the words you type are never sent to our measurement tools.
  • Anonymous usage metrics and crash reports are sent by default, to improve the app; you can turn each one off at any time in Settings › Privacy. Screen recordings are sent only if you turn them on.
  • Checking a word means fetching a file of the dictionary: the word itself is not sent.

What stays on your phone

The app stores locally, and only locally:

  • the game language you chose;
  • the history of checked words (up to 200);
  • your favorites;
  • the free-check counter;
  • the number of checks made, to choose when to show Apple’s rating sheet.

We cannot access them. History and Favorites can be cleared in the app; deleting the app deletes everything.

To check a word or show its meaning, the app asks our dictionary host over the internet (see below). History and favorites stay on the phone.

Dictionary lookups

The dictionaries are not stored on the phone: they are hosted as many small files on our static file host (Cloudflare R2, served by Cloudflare’s network). For each check, the phone fetches the file that holds the word, a group of more than a hundred words chosen by a calculation on the word. The request therefore contains neither the word itself nor any identifier. Like any web server, the host processes the phone’s IP address to deliver the file. We do not keep logs of it and do not link it to anything.

Legal basis: our legitimate interest in answering the check you ask for (GDPR article 6.1.f).

Usage metrics

On by default. To learn how the app is used and where it can improve, the app sends PostHog (hosted in the European Union) anonymous events from a closed list: app opened with a bracket of days since install, play checked with the game language, the number of words as a bracket and whether all were valid, check failed (offline or error), definition, history or favorites opened, favorite added or removed, game language chosen, purchase screen viewed and closed, purchase started, completed, cancelled or failed, purchases restored, Apple’s rating sheet requested, a privacy setting changed. Every event says whether the full version is active and which game language is set.

  • A random identifier created on the device, unrelated to your identity.
  • Each event carries the operating system, the app version and the language; the device’s name, manufacturer, model, screen, time zone and carrier are removed before sending.
  • Never the words you type or check, their definitions, your history or your favorites. The app asks PostHog not to geolocate the IP address, and the PostHog project is set not to keep it (“Discard client IP data”).
  • No automatic capture of taps.
  • Retention: 1 year.

You can object at any time by turning off “Help improve Lexiko” in Settings › Privacy: sending stops immediately, pending events are deleted, and the app no longer contacts PostHog.

Legal basis: our legitimate interest in measuring how the app is used in order to improve it (GDPR article 6.1.f), with your right to object.

Screen recording

Off by default: it starts only if you turn on “Share screen recordings” in Settings › Privacy. The app then sends PostHog images of the app’s screens while you use it (session replay), to see where it is unclear. What you type in the text field is masked; the words shown as tiles on the screen (a verdict, your history, a definition) can appear in these recordings. Taps are not recorded.

  • Retention: 30 days.

You can turn it off at any time with “Share screen recordings” in Settings › Privacy; recording stops immediately.

Legal basis: your consent (GDPR article 6.1.a), which you can withdraw at any time with the same switch.

Crash reports

On by default. When the app crashes or meets a technical error, it sends a report to Sentry (hosted in the European Union): the call stack, the device model, the operating system and its version, the app version, and the technical state of the device at that moment (language, free memory and storage). Reports are redacted before sending: no words you typed or checked, no user, no screenshot, and Sentry is set not to store the IP address.

  • Retention: 30 days.

You can turn them off at any time with “Send crash reports” in Settings › Privacy; the app stops sending them immediately.

Legal basis: our legitimate interest in fixing the app’s bugs (GDPR article 6.1.f), with your right to object.

Purchases

Purchases go through the App Store. RevenueCat (United States), our purchase provider, receives the purchase receipt and a random anonymous identifier to know whether the full version is active. We receive neither your name, your email address nor your payment details. The transfer to the United States is covered by the European Commission’s standard contractual clauses.

Legal basis: performance of the contract (GDPR article 6.1.b).

Rating the app

After a few games, the app may show Apple’s own rating sheet; Apple decides whether it appears. Any rating you leave is handled by Apple under its own rules.

Links

Opening a link from the app (the dictionary sources, this site) opens your browser; the page you visit then applies its own rules.

This website

This site uses no cookies, no analytics and no third-party scripts. Its host, Vercel, processes visitors’ IP addresses to serve the pages.

Providers

Provider Role Location
RevenueCat Purchase status United States (standard contractual clauses)
PostHog Usage metrics, screen recordings European Union (Frankfurt)
Sentry Crash reports European Union (Frankfurt)
Cloudflare Hosting of the dictionary files Global network (Cloudflare, Inc., United States)
Apple Payment, distribution, rating sheet Per its policies
Vercel Hosting of this website United States

Children

Lexiko shows no ads, has no social features and does not ask for any personal data. Its usage metrics, recordings and crash reports are anonymous and can be turned off in Settings.

Your rights

The GDPR gives you the right to access data about you, to have it corrected or erased, to restrict or object to its processing, and to ask for its portability. For any request, write to hello@teddyapps.net. Local data is managed directly in the app.

You can also lodge a complaint with the Belgian Data Protection Authority (APD/GBA), Rue de la Presse 35, 1000 Brussels, https://www.dataprotectionauthority.be, or with the authority of your country.

Changes

Any change is published on this page with its date. A change that would extend data collection would be announced in the app before it applies.