Comparison

Sea Current Measure Tool vs ROCKBROS

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

Head to head
About

Sea Current Measure Tool

This tool helps sailors and coaches measure sea current speed and direction directly on the water using an iPhone. It's designed for race preparation and training, using GPS data to calculate water movement from a floating object.

Highlights
  • Measure sea current speed and direction
  • GPS-based current calculation
  • Simple start and stop measurement
  • Store and review measurements
  • Display measurements on map
  • Useful for race preparation and training
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

ROCKBROS

Connect your cycle computer and indoor trainers for comprehensive data analysis. This app offers professional insights and dedicated services for cycling enthusiasts to enhance their indoor training.

Highlights
  • Cycle computer connectivity
  • Indoor trainer support
  • Professional data analytics
  • Dedicated indoor training services
  • Seamless indoor training sessions
Features
Read full description

ROCKBROS offers cycle computer connectivity and data analysis features, supporting connections to indoor cycling trainers for seamless indoor training sessions. It provides professional data analytics and dedicated indoor training services tailored for cycling enthusiasts.

Screenshots

Sea Current Measure Tool4 screens
ROCKBROS4 screens

Verdict

The call

The clearest difference is price: ROCKBROS at Free against Sea Current Measure Tool's $19.99. ROCKBROS also leads on iOS requirement (13.0 vs 17.0). On rating, ratings volume, update cadence and ads 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

ROCKBROS is free to download; Sea Current Measure Tool costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Sea Current Measure Tool against 5.0 for ROCKBROS. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Sea Current Measure Tool ships an update every 3 months, ROCKBROS every 2 months. The most recent releases landed on September 19, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 7 level
Sea Current Measure Tool versus ROCKBROS: the parameters behind the verdict, then further details
ParameterSea Current Measure ToolROCKBROS
Price$19.99Free — better
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews
Number of ratings11
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.013.0 — better
Further details — not scored
Size15 MB118 MB
Age rating4+4+
DeveloperMaster Sailing jdoo义乌洛克体育用品有限公司

Customer experience

Sea Current Measure Tool

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ROCKBROS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sea Current Measure Tool

No in-app purchases

None

ROCKBROS

No in-app purchases

Questions

Is Sea Current Measure Tool free?
Sea Current Measure Tool costs $19.99, with no in-app purchases.
Is ROCKBROS free?
ROCKBROS is free to download, with no in-app purchases.
Which has better reviews, Sea Current Measure Tool or ROCKBROS?
Sea Current Measure Tool and ROCKBROS are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Sea Current Measure Tool or ROCKBROS have ads?
Neither Sea Current Measure Tool nor ROCKBROS shows ads.
Which is updated more often, Sea Current Measure Tool or ROCKBROS?
Sea Current Measure Tool ships an update every 3 months, and ROCKBROS every 2 months. Most recently, Sea Current Measure Tool was updated on September 19, 2026 and ROCKBROS on September 8, 2026.

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