Dataversa
Mobile app Deployed

Dataversa

Mobile survey collection with offline support, media capture, and later synchronization.

Company
Dataversa
Platform
Android and iOS
Year
2024-2025
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Project Highlights

10 Response types form engine with rules, media capture, and special inputs
2 Platforms single Flutter codebase running on Android and iOS
Sync Offline collection field interviews stay on-device and sync later
ZIP Field backup exports structured JSON with images for audit or migration
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Overview

jhef@root: ~/dataversa-mobile$ cat README.md

Dataversa is a mobile application built with Flutter for structured data collection in research and field surveys. The app downloads questionnaires from a remote API and stores them locally, allowing researchers to conduct interviews and record responses even without an internet connection. Forms are dynamically rendered within the application and support relevance rules, enabling questions to appear or be hidden based on previous answers. The platform supports a wide range of field types, including photo capture, geolocation, date inputs, multiple choice, ranking, matrix questions, and open text responses. All responses are stored locally using Isar, allowing users to manage and filter collected data offline before synchronizing it with the remote platform. The application also includes export and backup features, generating ZIP files containing JSON data and collected images that can be easily shared. The project also includes native configuration for Android and iOS builds and integration with APIs compatible with the LimeSurvey RemoteControl pattern for questionnaire synchronization and response submission.

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Stack

jhef@root: ~/dataversa-mobile$ ls ./tech

// Mobile frontend

Flutter Dart Material GoRouter Signals

// Local data

Isar path_provider JSON

// Integrations

Dio dataversa.com.br API Upload de arquivos Geolocator Camera share_plus

// Build and tooling

Android Gradle Xcode Runner build_runner isar_generator flutter_lints
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Key Features

[01]

Dynamic forms

Questionnaire rendering with multiple question types, required fields, and relevance rules.

[02]

Survey catalog

Download and local organization of surveys, groups, questions, and properties from the remote API.

[03]

Offline/online sync

Responses stay on-device until upload, with session refresh and record and file synchronization.

[04]

Local storage and backup

Isar persistence plus ZIP backup generation containing structured JSON and captured images.

[05]

Authenticated session

Username and password login with a remote session key stored locally for re-authentication.

[06]

Response management

Listing, search, sorting, status filters, and delete or edit flows for responses per survey.

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Delivery Milestones

01

Field foundation

Built the Flutter foundation for field operations, including core navigation, dependency injection, and session-key-based authentication.

02

Offline survey catalog

Implemented survey, group, question, and metadata downloads with local Isar persistence for offline execution.

03

Interview engine

Built a dynamic form engine with relevance rules, media capture, geolocation, and multiple response types.

04

Submission and operational resilience

Consolidated response management with filters, incremental uploads, ZIP backups, and release hardening for the mobile operation.