Balèn Terla

First Launch and Account Creation

The moment Balèn Terla opens on an Android device, a login screen appears. New users must sign in with an email address to become an observer. The registration process is straightforward, requiring only an email and password. However, a critical limitation emerges immediately. The language selection is locked during profile creation. Once an account is set up, the language cannot be changed. This has frustrated users who selected the wrong language at signup. One reviewer reported deleting their account to restart, only to find the email address was still marked as used. The password recovery system then claimed the email did not exist. After logging in, the main dashboard displays a map of Réunion Island. The interface uses a clean design with minimal clutter. The navigation bar at the bottom provides access to the map, species guide, community chat, and profile settings. The map shows observation spots marked with pins. Tapping a pin reveals detailed information about the location, including photos and current sea conditions. The app requests location permissions immediately to enable the geolocation features. Without granting this permission, the map cannot show the user's position or nearby sightings. The onboarding process is functional but lacks flexibility in language settings, which can be a barrier for non-native speakers.

The Observation Workflow and Notification System

Reporting a whale sighting involves a multi-step process. The user taps the "Report" button on the map screen. A form appears asking for the time, location, species, and behavior of the observed animal. The app includes a species selector with detailed fact sheets for all cetaceans in the Indian Ocean. The user can also attach photos and notes. Once submitted, the observation appears on the map for all users to see. This real-time sharing creates a community-driven database of sightings. The 2026 update introduced a notification filter. Users can now choose to receive alerts only for sightings within a 20-kilometer radius of their position. This is particularly useful for those who want to know when whales are nearby without being overwhelmed by reports from the other side of the island. The interaction between the reporting feature and the notification system is where the app's design shows its strength. A user spots a whale, reports it, and within minutes, others in the area receive a notification. This drives coastal activity and encourages more people to participate. The app does not allow observations from boats, a restriction implemented in 2025 to reduce disturbance to the animals. The geolocation is locked to land-based use only. This ensures that the data collected is focused on coastal observation, which is less intrusive and more sustainable. The workflow is designed to promote responsible whale watching, but it also means that users cannot use the app to guide boat excursions.

Performance and Real-World Issues

The app generally performs well, but several issues have been documented. Some users have reported that the pages for discussions and precise locations appear blurred. This makes it difficult to access community features and view specific spots. Reinstalling the app does not resolve the issue. The language lock problem is another persistent complaint. Users who create a profile in one language cannot switch to another. This is a significant limitation for a multilingual app that is available in French, Creole, and English. The customer support response to these issues has been limited. The app's privacy policy states that location, identifiers, and diagnostic data are collected. This is standard for a mapping and reporting app, but it is worth noting for privacy-conscious users. The app's performance on older devices can be sluggish, particularly when loading the map with multiple observation pins. The app does not consume excessive battery life during normal use. The community chat feature allows users to discuss sightings and coordinate with other observers. However, the blurred page issue prevents some users from accessing this feature. The overall performance is acceptable for a citizen science app, though it does not match the polish of mainstream social media applications. The app has been downloaded by over 50,000 users across two seasons, indicating a strong user base despite the technical issues.

Technical Requirements and Permissions

The app requires Android 6.0 or higher to run. The APK size varies by device architecture, ranging from 55 MB to 110 MB. The app requests location permissions to enable the map and observation features. It also requires storage permissions to save photos and offline data. The app does not request camera or microphone access directly, though photos can be attached to observations. The app uses the device's GPS to determine the user's position for nearby sightings. The geolocation feature is locked to land-based use, preventing any misuse for boat-based observation. The app checks for available storage space before downloading offline content. If storage is low, a warning message appears. The app respects the device's power-saving settings, pausing background location updates when the battery is low. The app version displayed in the settings menu is 1.1.4. The app requires an active internet connection for real-time reporting and map updates. Offline mode is not available for most features. The app's data safety section indicates that no data is shared with third parties and no data is collected.