OpenSeas vs OASA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpenSeas
Access real-time ferry schedules and port information for Greece and surrounding countries. Find arrival and departure times for all Greek, Italian, Turkish, and Albanian ports with destinations in Greece.
- Real-time ferry route information
- Arrival and departure times
- Covers Greek, Italian, Turkish, Albanian ports
- Destinations in Greece
- Fast and reliable
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Easy, fast, reliable and immediate information on ferry routes in Greece and surrounding countries. Arrivals and departures of all Greek, Italian, Turkish and Albanian ports, to Greek destinations.
OASA
Get real-time bus information for Athens, including routes, schedules, and nearby stops. Navigate to stops using your preferred map app and receive important news updates via push notifications.
- Real-time bus tracking
- Nearby stop finder
- Route and schedule viewing
- Push notifications for news
- Two-language support
- Favorite lines and stops
- Apple Watch integration
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Information about routes and stops for urban transport (buses) in Athens, from the Athens Urban Transport Organization (OASA). NEW VERSION (1.2.5) with the following features and capabilities: * 2 language support (Greek & English). * Redesign of the entire UI for the best user experience. * View nearby stops on a map and list, depending on the user's geographic location (gps signal). As the user's location shifts, it automatically re-searches for nearby stops. * Directions to get to a stop by selecting a map application (Google/Apple Maps & Waze) to start navigation. * Access to the News with the possibility of searching and automatically informing the user with a notification (push notification) in case there is an important event / article (automated categorization / priority based on keywords). * List of main lines with the ability to view the route the bus crosses on a map. * Timetable / Daily schedule for each line * Real time update with buses running the selected route / selected line on the map (automatic update). * View stop arrival information in real time. * View vehicle arrival times for each stop. * View a list of route stops with colors for the start / end stop * Best route * Save favorite lines and stops, sync to iCloud * See your favorite stop arrivals from your apple watch Please note that the app requires internet access (via wifi or mobile data) to work and works best with location service enabled. For bug / error reporting, please don't forget to mention your unique Installation ID, that you can find in Settings by pressing the button "Copy Technical Details"
Screenshots
Verdict
The clearest difference is rating: OpenSeas at 5.0 against OASA's 2.7. OpenSeas also leads on iOS requirement (10.0 vs 17.5). OASA's advantage is update cadence (every 2 weeks vs every 17 months) and ratings volume (3 vs 1). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OpenSeas holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.
OpenSeas ships an update every 17 months, OASA every 2 weeks. The most recent releases landed on September 8, 2026 and September 18, 2026 respectively.
| Parameter | OpenSeas | OASA |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 2.7 (3 ratings) |
| Positive reviews | — | 13.8% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 17 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 10.0 — better | 17.5 |
| Further details — not scored | ||
| Size | 81 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | CRS LIKNOSS | Advanced Transport Telematics S.A. |
Customer experience
OpenSeas
OASA
In-app purchases
OpenSeas
No in-app purchases
OASA
No in-app purchases









