Comparison

RallyOdoTimer vs C4Timekeeper

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

Head to head
About

RallyOdoTimer

This GPS-based rally odometer offers Halda Twinmaster-like functionality for tracking main and auxiliary mileage. It features adjustable counters, interval timers, and customizable settings for units and timer behavior. Swipe controls prevent accidental button presses.

Highlights
  • Dual mileage counters (main and auxiliary)
  • Adjustable mileage increments
  • Interval timers with customizable settings
  • GPS monitoring with accuracy display
  • Swipe controls for reverse and stop buttons
  • KM/Miles unit selection
Read full description

A GPS based rally odometer with Halda Twinmaster-like functions. Upper counter is for main mileage. Lower counter is for auxiliary and interval mileage. Start button starts GPS monitoring. When started the text is green. Stop button stops GPS monitoring. Upper Counter mileage can be changed by 1, .1 and .01 buttons. Z-Aux sets the trip meter to zero. Split OM displays mileage when button was pressed and also resets trip. Factor field when pressed brings up a numeric entry field to edit the factor. Set Factor sets the factor to the value in the factor field and closes numeric entry. Chevrons set direction of mileage GPS Accuracy displays a count of how many GPS readings since last zero or start. Also displays the horizontal accuracy of the new and old GPS readings. The reverse buttons and stop buttons are activated by swiping rather than pushing in order to prevent inadvertent actions. Mileage is updated about once a second. Two interval timers. Functions can be set in settings KM/Miles Each timer/clock can be set to run in seconds or cents. Z-Aux zeros lower counter GPS/0 starts GPS and zeros both counters. Each timer/clock can be set to read in seconds or cents. Timer functions Timers are self resetting interval timers. Clear set;s them both to 0.00 and stops them. T1 wait delays the start of timer 1 until the top of the minute. Stop and start stops current timer and starts other timer at 0.00 Pause and start stops timer 1 and stars timer2. Pressing pause again starts timer 1 where it left off.Useful for pauses. Continued use of GPS running in the background can dramatically decrease battery life. If you plan to use for extended periods of time run with the charger connected.

About

C4Timekeeper

Read full description

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

Screenshots

RallyOdoTimer2 screens
C4Timekeeper4 screens

Verdict

The call

The clearest difference is in-app purchases: RallyOdoTimer at none against C4Timekeeper's 3. RallyOdoTimer also leads on iOS requirement (8.3 vs 16.0). C4Timekeeper's advantage is update cadence (every 2 months vs every 13 months). 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. RallyOdoTimer asks for nothing beyond the download.

UpkeepUpdate frequency

RallyOdoTimer ships an update every 13 months, C4Timekeeper every 2 months. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
RallyOdoTimer versus C4Timekeeper: the parameters behind the verdict, then further details
ParameterRallyOdoTimerC4Timekeeper
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 13 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS8.3 — better16.0
Further details — not scored
Size5 MB10 MB
Age rating4+4+
DeveloperClarence WestbergFilippo Gozza

In-app purchases

None

RallyOdoTimer

No 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

Questions

Is RallyOdoTimer free?
RallyOdoTimer is free to download, with no in-app purchases.
Is C4Timekeeper free?
C4Timekeeper is free to download, with in-app purchases available.
Do RallyOdoTimer or C4Timekeeper have ads?
Neither RallyOdoTimer nor C4Timekeeper shows ads.
Which is updated more often, RallyOdoTimer or C4Timekeeper?
RallyOdoTimer ships an update every 13 months, and C4Timekeeper every 2 months. Most recently, RallyOdoTimer was updated on October 11, 2026 and C4Timekeeper on October 8, 2026.

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