Last updated: November 7, 2026
AndroSigner: APK & AAB Signer ("AndroSigner", the "App") is developed by Krepel Studio. Its Android package name is com.krepelstudio.androsigner. This Privacy Policy explains how information is accessed, used, stored, and shared when you use the App.
AndroSigner lets you select existing APK or AAB files, import or create a signing keystore, sign files, verify their signatures, and save or share the results. The signing and verification operations are designed to run locally on your device. The App does not require you to create a Krepel Studio account.
When you choose a file using Android's system file picker, the App accesses the selected APK, AAB, or keystore solely to perform the action you requested. It may read the file name, size, structure, signing certificates, key aliases, and other technical information needed for signing and verification.
Signing files, private keys, and passwords are not uploaded to Krepel Studio servers. Private keys and passwords are used locally for the signing operation; passwords are not intentionally stored for future sessions, included in logs, or sent to analytics services. New keystores are saved as encrypted files to a location you select. The App does not modify your original APK or AAB.
The system picker may allow you to choose a document stored with a cloud provider. In that case, the provider may download the selected file to your device under its own privacy practices. AndroSigner does not independently upload that file to a cloud service.
The App may store the following locally to provide its features:
App preferences, such as language, appearance, vibration, and onboarding completion.
Separate counters for the one free successful APK signing and one free successful AAB signing.
The status of your Lifetime Pro access and purchase-related identifiers or tokens supplied through Google Play Billing when needed to recognize or restore your entitlement.
Temporary working copies of selected files and verified signed results required to complete signing, saving, or sharing.
The App does not scan your installed applications, build a catalog of their contents, or access files that you have not selected through the relevant Android interface.
AndroSigner uses Android's Storage Access Framework and system document picker to request access to individual files and save locations you select. It does not require broad access to all files on your device or permission to manage external storage.
Sharing uses Android's system sharing interface and grants the receiving app access to the selected signed result. The App does not require access to your contacts, precise location, microphone, camera, SMS messages, or inventory of installed applications for its signing features.
The App offers an optional, one-time Lifetime Pro purchase through Google Play Billing. Google processes payments and related transaction information under Google's own terms and privacy policy. Krepel Studio does not receive your full payment card details through the App.
To enable, verify, and restore Pro access, the App may receive purchase status, product identifiers, purchase tokens, and related entitlement information from Google Play. Google Play and its services may process information necessary for billing, account security, fraud prevention, and service operation.
Google's Privacy Policy: https://policies.google.com/privacy
The intended App does not include advertising, Google AdMob, a third-party advertising SDK, or a third-party analytics service. It does not sell your signing files, keystore data, or passwords.
The App uses local Android functionality and cryptographic libraries for signing and signature verification, together with Google Play Billing for optional purchases. When you open this Privacy Policy or another external link in your browser, that website or browser may handle data according to its own privacy terms.
The App shares a signed file with another app or service only when you explicitly choose to share it using the Android sharing interface. The receiving app or service may process or transmit that file under its own privacy policy.
If you email Krepel Studio for support, we may receive your email address, message, and any information or attachments you voluntarily provide. We use this information to respond to your request and address support issues. Please do not send private signing keys, keystore passwords, or other confidential material in support requests.
Temporary working files are removed when they are no longer needed where possible. Files left after an interrupted operation are cleaned up on a subsequent App launch. A temporary copy used for system sharing may be retained for approximately 24 hours and removed during a subsequent cleanup so the receiving app can access it.
Local preferences, free-use counters, and entitlement state generally remain until you clear the App's data or uninstall it. Files or encrypted keystores you intentionally save outside the App remain in the storage location you chose and must be managed or deleted there.
Google retains and handles purchase records under its own policies. Support correspondence may be retained for as long as reasonably needed to resolve the request or meet applicable legal obligations. You can contact us about information you have provided directly to Krepel Studio.
We design the App to process signing materials locally, limit file access to user-selected documents, avoid logging secrets, and exclude sensitive working files and keys from the App's automatic backup configuration. Temporary signing operations use App-private storage.
You are responsible for protecting copies of keystores and passwords that you save, and for choosing trusted destinations when exporting or sharing files. No device, storage provider, or transmission method can be guaranteed to be completely secure.
You can choose which files the App accesses, avoid making a Pro purchase, and decide whether to save or share any result. You can remove App-local information by clearing its storage or uninstalling it, subject to Android's behavior. Files exported to another location must be deleted from that location separately.
For privacy questions or requests concerning information sent directly to us, contact Krepelstudio@gmail.com. Requests involving payments or information held by Google may also need to be handled through Google Play or Google's privacy controls. Applicable privacy rights may vary by jurisdiction.
AndroSigner is a developer utility and is not designed or marketed for children. We do not intentionally seek personal information from children through its signing features.
We may update this Privacy Policy if the App's features, SDKs, data practices, or legal requirements change. The current version will identify its last updated date. We will provide additional notice where required by applicable law.
Developer: Krepel Studio
Website: https://krepelstudio.com/
Email: Krepelstudio@gmail.com
Application: AndroSigner: APK & AAB Signer
Package: com.krepelstudio.androsigner