C4Timekeeper
C4Timekeeper Summary
C4Timekeeper is a with in-app purchases Android app in Sports by Filippo-Software. Released in May 2014 (11 years ago). It has about 2.6K+ installs Based on AppGoblin estimates, it reaches roughly 226 monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Jul 28, 2025.
Recent activity: 3.00 installs this week (133 over 4 weeks) showing exceptional growth View trends →
Store info: Last updated on Google Play on Jul 28, 2025 .
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Ratings: 0
Screenshots
App Description
Stopwatch for timekeeper of Oldtimer Rallye
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