Comparison

TideMeasure vs The R.O.C.

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

Head to head
About

TideMeasure

Measure sea current speed and direction using your iPhone's GPS. Ideal for sailors, coaches, and race teams to map readings, review history, and share data for tactical advantage. Works offline.

Highlights
  • Measure current speed and direction with GPS
  • View results in multiple units (m/min, m/s, cm/s, knots)
  • Map measurements across race areas
  • Review saved measurements and history
  • Create or join teams to share readings
  • Export measurements as CSV
  • Offline measurement capability
Features
Read full description

Measure sea-current speed and direction from your iPhone in minutes—built for sailors, coaches, and race teams. Map readings across the race area, review history, export CSV data, and share measurements with your team for smarter tactical decisions. WHY TIDEMEASURE Even a small current can change boat speed, laylines, mark roundings, and the favored side of the course. TideMeasure turns a simple drift test into a clear speed-and-direction result without specialized hardware. HOW IT WORKS 1. Drop a floating stick or small object into the water. 2. Tap Start as it begins to drift. 3. Retrieve it after a short measurement. 4. Tap Stop to see current speed and direction. FEATURES • Measure current speed and direction using GPS • View results in m/min, m/s, cm/s, or knots • Map measurements across the race area • Review saved measurements and history • Create or join a team and share readings • Select and export measurements as CSV • Continue measuring offline TideMeasure is designed for race preparation, coaching, training sessions, and building a clearer picture of current around the course. Location access is required during measurements and for displaying results on the map. Apple Maps data is used for mapping.

About

The R.O.C.

Features
Read full description

After several years of studying the Optimists events around the world, the changes in sailing and the rapid switch into a technological race which in a way put sailors and coaches into a second row seat, Famagusta Nautical Club and Chesva 2.0 are teaming up to put the First Ever Regatta of Champions. 2022 Chesva Regatta of Champions – The R.O.C., is a result of a four year efforts which finally reached the implementation phace. The two partners worked together and put a format of a Regatta that never took place before.

Screenshots

TideMeasure4 screens
The R.O.C.4 screens

Verdict

The call

The clearest difference is price: The R.O.C. at Free against TideMeasure's $19.99. The R.O.C. also leads on iOS requirement (15.6 vs 17.0). 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

The R.O.C. is free to download; TideMeasure costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

TideMeasure ships an update every 2 months, The R.O.C. every 5 weeks. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
TideMeasure versus The R.O.C.: the parameters behind the verdict, then further details
ParameterTideMeasureThe R.O.C.
Price$19.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.6 — better
Further details — not scored
Size14 MB18 MB
Age rating4+4+
DeveloperMaster Sailing jdooGEORGIOS TRIMITHIOTIS

In-app purchases

None

TideMeasure

No in-app purchases

None

The R.O.C.

No in-app purchases

Questions

Is TideMeasure free?
TideMeasure costs $19.99, with no in-app purchases.
Is The R.O.C. free?
The R.O.C. is free to download, with no in-app purchases.
Do TideMeasure or The R.O.C. have ads?
Neither TideMeasure nor The R.O.C. shows ads.
Which is updated more often, TideMeasure or The R.O.C.?
TideMeasure ships an update every 2 months, and The R.O.C. every 5 weeks. Most recently, TideMeasure was updated on November 3, 2026 and The R.O.C. on October 25, 2026.

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