Light MeterPrivacy Policy
Last updated: 7 November 2026
Light Meter is an app from Itworked Systems, a company registered in Türkiye. This page explains what the app does with information.
Itworked Systems is responsible for the app under Turkish data protection law (KVKK, Law No. 6698) and, for users in the EU and the UK, the GDPR.
- The camera is used only to measure light, live on your phone. The picture is shown on screen while you meter and is never taken as a photo or video, saved or sent anywhere.
- Your settings, camera and film presets and notes stay on your phone.
- The app sends anonymous install and app-open statistics (a random ID for each install and basic device details) to Adapty, the service we use for analytics and for the optional Pro purchase.
- If you buy Pro, Apple or Google take the payment, and Adapty receives the purchase record so Pro can be unlocked and restored.
- No account, no sign-in, no ads, no tracking, no advertising ID. The meter works without an internet connection.
- We never sell your information.
What leaves your phone, and why
| What | Why | Who receives it |
|---|---|---|
| If you buy Light Meter Pro: what you bought and when, and the store's receipt | To unlock Pro, restore it on a new phone, and count sales | Adapty, which checks purchases for us, and Apple or Google, which take the payment. We never see your card details |
| A random ID made for each install, the app's device ID for our apps (on iPhone, the identifier for vendor), basic device details (such as phone model, system version, language, time zone, store country and app version), how this copy was installed (from the App Store or Google Play, a test build, a simulator or a development copy, so tests can be left out of our statistics) and when the app is opened | To count installs and how often the app is used, so we can see whether it is useful and improve it (analytics) | Adapty (Adapty Tech Inc.), which processes it for us |
That is all. The app turns off Adapty's IP address lookup and its advertising ID collection, does not ask to track you, and never sends Adapty anything from the camera, the light sensor, your readings, presets or notes. The data is not linked to your name or any account (there is none). Your connection's IP address is necessarily seen by Adapty's servers to deliver the request, but the app tells Adapty not to store or use it. Read how Adapty handles this data at adapty.io/end-users-privacy.
Why we may use this data
For purchases: to deliver what you bought. For statistics: our legitimate interest in understanding how many people use the app and keeping it working well. The statistics are anonymous and minimal, and you can stop them at any time by deleting the app.
How long it is kept
- On your phone: settings, presets and notes stay until you delete them or the app.
- Purchase records are kept by Adapty for us so Pro can be checked and restored, and by Apple or Google under their own rules.
- Usage statistics are kept by Adapty for us for as long as we use its service for this app, and deleted on request where we can identify them.
Where the data is processed
Adapty is based outside Türkiye and may process data in other countries, including the United States. These transfers follow the rules for sending data abroad in Turkish data protection law and, for users in the EU and the UK, the GDPR.
What the app uses on your phone
- The camera, with your permission, to measure light. The app reads the exposure settings your phone's camera picks for the scene (its ISO, exposure time and aperture) and works out the light level from them. The live picture is only drawn on your screen; the app has no photo or video capture at all, so nothing from the camera is ever stored or sent.
- The ambient light sensor (Android only), if you choose it on the Lux tab, to read the light level. Readings are used live and then discarded.
- Vibration, for a small click as the dials turn. You can turn it off in Settings.
- Your settings, presets and notes (film speed, the dial values, metering mode, calibration, your cameras and films, and the readings you save with your own words) are kept in the app's own storage on your phone. Deleting the app deletes them. If you tap Share on the Notes tab, the text goes to the app you pick (for example Mail or Messages); we do not receive it.
The app does not use your microphone, location, contacts, photo library or files, and it does not ask for those permissions.
App stores and links
Apple and Google run the stores you download the app from, and may collect information about downloads and crashes under their own privacy policies, for example if you choose to share crash reports with developers in your phone's settings. The Settings screen links to this website; if you open those links, your browser visits itworkedsystems.com like any other website, and our host Cloudflare processes the request to deliver the page. We run no analytics on these pages.
Your rights
Under Turkish data protection law (KVKK, article 11) and the GDPR you can ask whether we process data about you, and ask for access, correction or deletion. We hold almost nothing ourselves; we will help with anything Adapty keeps for us. If you email us, we use your message only to answer it and delete it when it is no longer needed. You can also complain to Türkiye's Personal Data Protection Authority (Kişisel Verileri Koruma Kurumu) or, if you live in the EU or the UK, to the data protection authority where you live.
Deleting your data
Everything you create in the app is on your phone: delete notes on the Notes tab, or delete the app to remove all of it. To have the anonymous statistics or purchase record that Adapty keeps for us deleted, email info@itworkedsystems.com; if you bought Pro, include the order ID from your Apple or Google receipt so we can find the record. Purchase records that Apple or Google must keep by law stay with them.
Children
The app is not made for children under 13, and we do not knowingly process their data.
Changes
If the app ever starts using data in a new way, we will update this page and the date at the top before that version is released.