OASA vs Mercury
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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"
Mercury
Easily rent and ride electric bikes across Greece. Scan a QR code to unlock a bike and return it to a designated spot to end your rental and charge.
- Thousands of bikes nationwide
- QR code unlocking
- Designated parking spots
- High-quality vehicles
- Easy rental process
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Mercury is the largest bike sharing company in Greece, with thousands of bikes all over the country. After downloading our app and singing up, just scan the QR code and enjoy your ride on our highest quality available vehicles. To end charging you just return your bike to a designated parking spot in our application and lock it.
Screenshots
Verdict
The clearest difference is rating: Mercury at 4.5 against OASA's 2.7. Mercury also leads on review sentiment (36% vs 14%) and ratings volume (25 vs 3). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Mercury holds the better App Store score, 4.5 against 2.7. That said, the two scores are not equally well evidenced: Mercury has 25 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 14% of OASA's written reviews are positive against 36% of Mercury's.
Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on October 11, 2026.
| Parameter | OASA | Mercury |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) | 4.5 (25 ratings) — better |
| Positive reviews | 13.8% of reviews | 36.1% of reviews — better |
| Number of ratings | 3 | 25 — better |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.5 | 15.6 — better |
| Further details — not scored | ||
| Size | 35 MB | 106 MB |
| Age rating | 4+ | 4+ |
| Developer | Advanced Transport Telematics S.A. | SIA ATOM Tech |
Customer experience
OASA
Mercury
In-app purchases
OASA
No in-app purchases
Mercury
No in-app purchases









