C4Timekeeper

Stopwatch for timekeeper of Oldtimer Rallye

Filippo-Software · fg.Crono4Timekeeper_lite

Not rated yet 1K+ downloads v4.72 7.9 MB Android 7.0+ PEGI 3 · Everyone

Download APK 7.9 MB All versions

Signature matches the Google Play version Details

Watch the C4Timekeeper trailer on YouTube

At a glance

Latest version: v4.72 (69)
Updated: Sep 22, 2026 (16 days ago)
APK size: 7.9 MB
Requires: Android 7.0+ (API 24)
CPU support: Any (no native code)
Category: Sports (app)
Listed since: Feb 25, 2025 (at least)
Permissions: 25 (7 sensitive)
Website: filippo-software.de
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

C4Timekeeper is an app by Filippo-Software in the Sports category, listed since at least February 2025. It has no native code, so it runs on any Android processor.

It asks for 25 permissions, 7 of them sensitive, including precise location, approximate location and read phone status and identity. Compared with version 4.61, it drops 1 permission: “Modify shared storage”. The app offers in-app purchases through Google Play and can read the advertising ID that ad and analytics services use.

What's new in v4.72

A display error during manual time synchronization that occurred when the default font was not used has been fixed.

Description

From the listing uploaded by “appupdater”.

Stopwatch for timekeeper This app is a stopwatch for timekeeper of Oldtimer Rallye This app replaces the expensive stopwatch of Oldtimer Rally organizer. This app can be used by the timekeeper for the secret time control. On the external Bluetooth button (can be me ordered ) a photocell can be connected. A printer is not necessary, because you can send the times by e-mail to the organizers. Thus, need for evaluations, the organizers do not wait until the timerkeeper to come back. Synchronization of the clock: 1. Manually, using as a reference the time of the organizers. 2. The atomic time, using one of the many global or regional server. 3. GPS, using the satellite time. Functions: You can use for the Stop, the green software button "Start" or the Volume keys DOWN or UP (+ -). For the Stop can also be used with an external button. This button is available in two versions, as USB and Bluetooth. Further information at: https://filippo-software.de Important! A photocell can at the input for the button to be connected (the contact is open). Limitations of the Free version: * A maximum. 5 times to stop. Supported languages: German, Italian, English

Version history

3 versions are listed, going back to v4.60.

v4.72 LATEST Sep 22, 2026 7.9 MB TRUSTED v4.61 May 19, 2026 7.9 MB TRUSTED v4.60 Jan 31, 2026 7.2 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 22, 2026.
Certificate issued to “fg.Software” 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 22, 2026
Validated against Google Play Sep 22, 2026
Signed byCN=Filippo Gozza, O=fg.Software, C=de
Signing certificate (SHA-1)14:6B:6C:E0:88:49:E0:2B:98:F0:92:6E:6E:B3:BE:AE:60:31:4A:71
File MD53f990a8733e23eb00e18c4c5d2ed31f2
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 (25)

C4Timekeeper requests 25 permissions, 7 of them sensitive.

Approximate location Sensitive android.permission.ACCESS_COARSE_LOCATION
Bluetooth advertise Sensitive android.permission.BLUETOOTH_ADVERTISE
Bluetooth connect Sensitive android.permission.BLUETOOTH_CONNECT
Bluetooth scan Sensitive android.permission.BLUETOOTH_SCAN
Precise location Sensitive android.permission.ACCESS_FINE_LOCATION
Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
Write settings Sensitive android.permission.WRITE_SETTINGS
Access coarse updates android.permission.ACCESS_COARSE_UPDATES
Advertising ID com.google.android.gms.permission.AD_ID
Bluetooth android.permission.BLUETOOTH
Bluetooth admin android.permission.BLUETOOTH_ADMIN
Change network state android.permission.CHANGE_NETWORK_STATE
Control vibration android.permission.VIBRATE
Full network access android.permission.INTERNET
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) fg.Crono4Timekeeper_lite.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Push messaging (app-defined) fg.Crono4Timekeeper_lite.permission.C2D_MESSAGE
Read Google service settings com.google.android.providers.gsf.permission.READ_GSERVICES
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Run foreground services android.permission.FOREGROUND_SERVICE
Use biometric hardware android.permission.USE_BIOMETRIC
Use fingerprint hardware android.permission.USE_FINGERPRINT
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Bluetooth android.hardware.bluetooth
Basic touch input android.hardware.faketouch
Location android.hardware.location
Portrait screen android.hardware.screen.portrait

C4Timekeeper APK: questions and answers

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 C4Timekeeper free?

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

Is the C4Timekeeper 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 3f990a8733e23eb00e18c4c5d2ed31f2.