Customer Database

Simple Customer Management

Georg Sieber · de.georgsieber.customerdb

Not rated yet 100K+ downloads v3.12.2 7.7 MB Android 5.0+ PEGI 3 · Everyone

Download APK 7.7 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v3.12.2 (102)
Updated: Sep 27, 2026 (11 days ago)
APK size: 7.7 MB
Requires: Android 5.0+ (API 21)
CPU support: Any (no native code)
Category: Productivity (app)
Listed since: Aug 24, 2021 (at least)
Permissions: 8 (3 sensitive)
Website: georg-sieber.de
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Customer Database is an app by Georg Sieber in the Productivity category, listed since at least August 2021. It has no native code, so it runs on any Android processor.

Since version 3.11.5, the APK grew from 6.8 MB to 7.7 MB and the minimum Android version rose from 4.0.3 to 5.0. It asks for 8 permissions, 3 of them sensitive: camera, read shared storage and modify shared storage. It asks for the same permissions as version 3.11.6. The app offers in-app purchases through Google Play.

What's new in v3.12.2

- Material3 design - improved UI for customer selection in voucher/appointment with search

Description

From the listing uploaded by “appupdater”.

This simple customer database application is designed for small companies for easy and secure customer management on smartphones and tablets, separated from private contacts. It is possible to sync your data with a (self-hosted) MySQL server to prevent loss or defect of your mobile device. This also allows to sync the data with multiple devices. In addition to that, it has tools for the EU-GDPR and you can group customers, manage customers birthdays and vouchers, write newsletters, import customers from VCF files, export your data into VCF or CSV files and print a customer record (PDF export). Additionally, this app has a Dark Mode and the ability to save customer images. The app shows you the name of the customer for incoming calls if the phone number is stored in the customer database (caller identification / caller ID). Because of its high flexibility, the application is also often used in non-enterprise areas, such as teachers' management of parent contact information. Additional features that can be unlocked via in-app purchase: -> Custom Fields: also drop down selection lists and sorting by these fields is supported. -> "Input-Only-Mode": Optional activatable mode that allows only data entry. For example, the device can be handed to showroom visitors. -> Calendar: Manage customer appointments. Customers can insert the appointment directly into their calendar using a QR code. -> File Attachments: Attach up to 20 files to a customer. -> Design Options: Allows you to set your own title bar color and own startup logo. This App is Open Source: https://github.com/schorschii/customerdb-android

Version history

3 versions are listed, going back to v3.11.5. Since v3.12.2 it requires Android 5.0+.

v3.12.2 LATEST Sep 27, 2026 7.7 MB TRUSTED v3.11.6 Sep 20, 2026 6.8 MB TRUSTED v3.11.5 Dec 7, 2024 6.8 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Sep 27, 2026.
Certificate issued to “Georg Sieber IT-Dienstleistungen” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Sep 27, 2026
Validated against Google Play Sep 27, 2026
Signed byCN=Georg Sieber, O=Georg Sieber IT-Dienstleistungen, L=Dresden, ST=Sachsen, C=DE
Signing certificate (SHA-1)5B:8D:11:42:EA:6E:D4:C0:CB:B4:D2:9C:30:8F:95:8B:E1:D3:8B:05
File MD587e12a6ad11a995914db42a2e86d8db8
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (8)

Customer Database requests 8 permissions, 3 of them sensitive.

Camera Sensitive android.permission.CAMERA
Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
Control vibration android.permission.VIBRATE
Full network access android.permission.INTERNET
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) de.georgsieber.customerdb.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch

Customer Database APK: questions and answers

Is there a version of Customer Database for older Android phones?

The current version needs Android 5.0 or later. Version 3.11.6 is the newest listed build that installs on Android 4.0.3 and later. Get version 3.11.6 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is Customer Database free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the Customer Database APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 87e12a6ad11a995914db42a2e86d8db8.