TideMeasure vs IODA Optimist
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
IODA Optimist
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Official mobile application of the IODA (International Optimist Dinghy Association) Championships. Live information on all races; constant results updates; daily news, images and videos of the regatta are some of the examples offered by this App to enable you to track down to the minute everything that is going on during every Optimist class major championship. Furthermore, if you wish so, you can receive alerts of any relevant information from any of the races or teams you wish to follow closely. With this App, live the major IODA Major Championships wherever you may be as you had never imagined! 3392
Screenshots
Verdict
The clearest difference is price: IODA Optimist at Free against TideMeasure's $19.99. IODA Optimist also leads on iOS requirement (11.0 vs 17.0). TideMeasure's advantage is chart position (#43 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
IODA Optimist is free to download; TideMeasure costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 30, 2026 and October 5, 2026 respectively.
| Parameter | TideMeasure | IODA Optimist |
|---|---|---|
| Price | $19.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #43 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Master Sailing jdoo | Sailti |
In-app purchases
TideMeasure
No in-app purchases
IODA Optimist
No in-app purchases
Questions
Is TideMeasure free?
Is IODA Optimist free?
Do TideMeasure or IODA Optimist have ads?
Which is updated more often, TideMeasure or IODA Optimist?
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