Last updated: November 10, 2026
MarsGroupApp provides Negative Lab for Android (package com.marsgroup.negativeLab). This Privacy Policy explains how the app handles information. Negative Lab does not require a MarsGroupApp account.
Photos and editing
Negative Lab uses the Android photo picker to read the images you choose. It does not request access to your entire photo library. Photo conversion and editing happen on your device. Negative Lab does not upload your photos or editing settings to MarsGroupApp.
When you save an image to Photos, Negative Lab writes a JPEG to your device’s Pictures/Negative Lab folder. When you share an image, Negative Lab gives the app you select temporary access to the exported JPEG. The receiving app’s privacy policy applies to its use of that image.
Storage, security and deletion
Negative Lab keeps settings, custom presets and up to 20 recent history entries in app-private storage. History entries include a copy of the source photo, a preview and editing settings so you can reopen your work. Temporary import and sharing files are kept in the app’s storage and cleaned up as part of normal app use. Negative Lab excludes its app data from Android backup and device transfer.
You can delete individual history entries and custom presets in the app. Clearing app storage in Android Settings or uninstalling Negative Lab removes app-local data. Photos you already saved to your gallery can be deleted in your gallery app. Copies already shared with other apps are managed by those apps.
Google Play purchases
Google Play processes payments for the one-time Negative Lab Pro upgrade. MarsGroupApp does not receive your payment card details. Negative Lab uses Google Play purchase information, including the product ID, purchase status, purchase token and signed receipt, to verify, acknowledge or restore your purchase. A verified receipt is stored in app-private storage for offline access. Removing app data does not remove your purchase from Google Play.
Advertising and privacy choices
In builds where advertising is enabled, the free version uses Google AdMob and Google’s User Messaging Platform to show ads and manage consent. Google and its advertising partners may process IP addresses, approximate location derived from IP addresses, device or account identifiers such as the advertising ID, app and ad interactions, and diagnostics. This data is used for advertising, measurement and fraud prevention. Google’s Mobile Ads SDK encrypts data in transit. Pro removes in-app ads. When available, use Privacy Choices in Settings to review or update ad consent, or manage your advertising ID in Android Settings.
For details on Google’s data practices and controls, see Google’s Privacy Policy.
Feedback and privacy contact
Feedback in Settings opens an email draft in your chosen email app. If you send it, MarsGroupApp receives your email address and the message or attachments you choose to include. We use that information to respond and keep it as long as needed to handle your request and meet applicable obligations. Contact marsgroupapp@gmail.com with privacy questions or to request deletion of information we hold.