Comparison

IODA Optimist vs The R.O.C. Kosmos

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

Head to head

IODA Optimist

IODA Optimist Official App

About

IODA Optimist

Features

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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

About

The R.O.C. Kosmos

Features

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The R.O.C. Kosmos (Regatta of Champions - Kosmos) is a worldwide subsidiary qualification event for the Regatta of Champions (The R.O.C.), specifically for Optimist sailors. Introduced in 2024, this event was created to establish a high-level qualification system, ensuring the best selection of the Elite 45 Optimist Sailors from around the world. R.O.C. Kosmos is open to all Optimist sailors and follows the same format and sailing rules as The R.O.C.. Currently held in Europe, the goal is to expand qualification events across all continents, providing more sailors with the opportunity to compete at the highest level.

Screenshots

IODA Optimist4 screens

The R.O.C. Kosmos4 screens

Verdict

The call

The clearest difference is iOS requirement: IODA Optimist at 11.0 against The R.O.C. Kosmos's 15.6. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

IODA Optimist ships an update every 2 months, The R.O.C. Kosmos every 6 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 5 level

IODA Optimist versus The R.O.C. Kosmos: the parameters behind the verdict, then further details
Parameter	IODA Optimist	The R.O.C. Kosmos
Price	Free	Free
Update frequency	Every 2 months	Every 6 weeks — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	11.0 — better	15.6
Further details — not scored
Size	67 MB	19 MB
Age rating	4+	4+
Developer	Sailti	GEORGIOS TRIMITHIOTIS

In-app purchases

None

IODA Optimist

No in-app purchases

None

The R.O.C. Kosmos

No in-app purchases

Questions

Is IODA Optimist free?

IODA Optimist is free to download, with no in-app purchases.

Is The R.O.C. Kosmos free?

The R.O.C. Kosmos is free to download, with no in-app purchases.

Do IODA Optimist or The R.O.C. Kosmos have ads?

Neither IODA Optimist nor The R.O.C. Kosmos shows ads.

Which is updated more often, IODA Optimist or The R.O.C. Kosmos?

IODA Optimist ships an update every 2 months, and The R.O.C. Kosmos every 6 weeks. Most recently, IODA Optimist was updated on November 4, 2026 and The R.O.C. Kosmos on October 30, 2026.