Comparison

C4Timekeeper vs Chrono X

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

C4Timekeeper

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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

About

Chrono X

Features
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The app is used in Motor Sports events to provide accurate and reliable data on the participant (driver) location and time. The app measures speed, distance, position, leg times and other relevant metrics. Our backend system uses this data to calculate the results in real time and display live results, rankings, statistics and analysis and e publish them at live.chronopulse.com. We are official partners of INRC and FMSCI for most Motorsports Rally events in India. You can view some of the events at https://live.chronopulse.com/ Video explaining the app is at https://youtu.be/ZQoaVBwitYc?si=4duQj2dn__LMHXxM

Screenshots

C4Timekeeper4 screens
Chrono X4 screens

Verdict

The call

The clearest difference is in-app purchases: Chrono X at none against C4Timekeeper's 3. Chrono X also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (12.2 vs 16.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. C4Timekeeper sells 3 one-off in-app purchases. Chrono X asks for nothing beyond the download.

UpkeepUpdate frequency

C4Timekeeper ships an update every 2 months, Chrono X every 2 weeks. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 3 level
C4Timekeeper versus Chrono X: the parameters behind the verdict, then further details
ParameterC4TimekeeperChrono X
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.012.2 — better
Further details — not scored
Size10 MB94 MB
Age rating4+4+
DeveloperFilippo GozzaBLUE BYTES DATA LABS PRIVATE LIMITED

In-app purchases

3 purchases

C4Timekeeper

One-time3
  • Full version for one month$4.99
  • Full version for 6 months$8.99
  • Full version for one year$13.99
None

Chrono X

No in-app purchases

Questions

Is C4Timekeeper free?
C4Timekeeper is free to download, with in-app purchases available.
Is Chrono X free?
Chrono X is free to download, with no in-app purchases.
Do C4Timekeeper or Chrono X have ads?
Neither C4Timekeeper nor Chrono X shows ads.
Which is updated more often, C4Timekeeper or Chrono X?
C4Timekeeper ships an update every 2 months, and Chrono X every 2 weeks. Most recently, C4Timekeeper was updated on October 8, 2026 and Chrono X on October 1, 2026.

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