# C4Timekeeper

> C4Timekeeper (iPhone/iPad app by Filippo Gozza.)

- Source: https://appshunter.io/ios/app/c4timekeeper/id1003021684 (this page in markdown: same URL + `.md`)
- Developer: [Filippo Gozza](https://appshunter.io/developer/954580932)
- Category: Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 9 MB
- Languages: American English
- Released: 2015-06-18
- Data updated: 2026-08-16
- User reviews in markdown: https://appshunter.io/ios/app/c4timekeeper/id1003021684/reviews.md

## What is C4Timekeeper?

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 timer to come back.


Synchronization of the clock:
   1. Manually, using as a reference the time of the organizers.
   2. GPS, using the satellite time.
   3. The atomic time, using one of the many global or regional server.

Functions:
   You can use for the Stop, the green software button "Start".

   For the Stop can also be used with an external bluetooth-button.
   The button works with all iPad e iPhone.

Important! A photocell can at the input for the button to be connected (the contact is open).
           The external button, you can order from me, price see at https://filippo-software.de.


Limitations of the Free-version:
    * A maximum. 5 times to stop.


Supported languages:
German, Italian, English

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full version for one year | $13.99 | one-time |
| Full version for one month | $4.99 | one-time |
| Full version for 6 months | $8.99 | one-time |



## Version history (last 5 releases)

### 3.60 — 2026-05-19

* Starting with this version, iOS 16 or higher is required.
* General optimization and bug fixes

### 3.56 — 2025-12-02

General optimization and bug fixes

### 3.50.1 — 2025-02-06

An error during the initialization of GPS has been fixed.

### 3.50 — 2025-02-04

* The saved files can be opened as table files.
* Optimizations and improvements

### 3.45 — 2024-10-02

Optimizations and improvements

## Apps similar to C4Timekeeper

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Regularity Mate: TSD Rally](https://appshunter.io/ios/app/regularity-mate-tsd-rally/id6759557753) | — | Free | Sports |
| [VinCarLite](https://appshunter.io/ios/app/vincarlite/id1575144226) | — | Free | Sports |
| [Rally Master](https://appshunter.io/ios/app/rally-master/id1466574486) | 3.0 (2) | Free | Sports |
| [EBATime2](https://appshunter.io/ios/app/ebatime2/id877182204) | — | Free | Sports |
| [Rally Co-Pilot - Classic TSD](https://appshunter.io/ios/app/rally-co-pilot-classic-tsd/id911024623) | 3.8 (6) | Free | Sports |
| [ChronoMaster Lite](https://appshunter.io/ios/app/chronomaster-lite/id431674248) | — | Free | Sports |

## More apps by Filippo Gozza

- [Solitario-Lite](https://appshunter.io/ios/app/solitario-lite/id954580933)
- [CRONO-MILLE-MIGLIA](https://appshunter.io/ios/app/crono-mille-miglia/id965652869)
- [StopWatch4all](https://appshunter.io/ios/app/stopwatch4all/id976503299)
- [StopWatch4all-Pro](https://appshunter.io/ios/app/stopwatch4all-pro/id976503851)
- [Crono VespaRaid](https://appshunter.io/ios/app/crono-vesparaid/id1017782309)

All apps by Filippo Gozza: https://appshunter.io/developer/954580932

## Related topics

[c4timekeeper](https://appshunter.io/ios/topics/c4timekeeper)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*