Comparison

T Minus sailing timer vs OnboardAssistant

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

Head to head
About

T Minus sailing timer

This app provides a continuous countdown for sailing races, with customizable sound signals and voice readouts. It offers two distinct modes for competitors and race committees, including features like quick postponement and a repeat option for race management.

Highlights
  • Advance start time setting
  • Repeat option for race committees
  • Competitor mode (minimal interface)
  • Committee mode (time to start/next signal)
  • Configurable sound signals
  • Voice readouts
  • Quick postpone feature
Features
Currently charting
Read full description

Set the start time in advance and get a continuous countdown. Features include: - Set your start in advance - Repeat option is perfect for race committees - Two modes: - Competitor mode with minimal interface or - Committee mode with time to start and time to next signal - Configurable sound signals - Voice readouts of minutes to start and configurable seconds in the last minute - Quick postpone feature for race committee use - English, French, Dutch, and Italian interface and voice readout

About

OnboardAssistant

Features
Read full description

OnboardAssistant is a handy little tool for yacht racing which will complement your onboard electronics and let you get rid of wet notes. It will let you ping sail changes, race times, changes in boat configuration, incidents, performance comments and any other important user-defined event which is not captured directly by your electronics. It also lets you take pictures, record audio and video while you are out on the water. Once your sailing session is complete you can review and update your notes and upload it all to the cloud. Once in the cloud, the data can be accessed by a number of thrid party tools such as SailingPerformance's RaceReplay. All your data will then be automatically be loaded and synchronized, ready to be analyzed! Terms of use available at: https://www.advancedsailingperformance.com/oba-terms-service.html

Screenshots

T Minus sailing timer4 screens
OnboardAssistant4 screens

Verdict

The call

The clearest difference is price: OnboardAssistant at Free against T Minus sailing timer's $0.99. T Minus sailing timer's advantage is chart position (#188 vs unranked). On update cadence, ads, in-app purchases 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

OnboardAssistant is free to download; T Minus sailing timer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

T Minus sailing timer ships an update every 2 months, OnboardAssistant every 5 weeks. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 7 level
T Minus sailing timer versus OnboardAssistant: the parameters behind the verdict, then further details
ParameterT Minus sailing timerOnboardAssistant
Price$0.99Free — better
Positive reviews100.0% of reviews—
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank#188 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size1 MB37 MB
Age rating4+4+
DeveloperPaul MillerSailingPerformance S.L

In-app purchases

None

T Minus sailing timer

No in-app purchases

None

OnboardAssistant

No in-app purchases

Questions

Is T Minus sailing timer free?
T Minus sailing timer costs $0.99, with no in-app purchases.
Is OnboardAssistant free?
OnboardAssistant is free to download, with no in-app purchases.
Do T Minus sailing timer or OnboardAssistant have ads?
Neither T Minus sailing timer nor OnboardAssistant shows ads.
Which is updated more often, T Minus sailing timer or OnboardAssistant?
T Minus sailing timer ships an update every 2 months, and OnboardAssistant every 5 weeks. Most recently, T Minus sailing timer was updated on October 23, 2026 and OnboardAssistant on October 7, 2026.

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