What happens when two users edit the same record offline simultaneously?

Our conflict resolution engine supports multiple strategies configurable per field type. Numeric fields like quantities can use additive merging. Timestamp fields use last-write-wins with server clock authority. Free-text fields can use operational transform for character-level merging. For business-critical fields where automatic resolution is unsafe — like approval statuses or financial amounts — we queue the conflict for manual resolution and notify both users. The strategy is defined during architecture planning based on your domain requirements.

Can you integrate biometric auth with our existing SSO and identity provider?

Yes. We integrate biometric authentication as a local unlock mechanism that works alongside your existing identity provider (Okta, Auth0, Azure AD, or custom). The initial authentication goes through your standard SSO flow. Subsequent app opens use biometric verification to unlock the locally cached session token, with configurable expiry that forces full re-authentication at intervals your security policy requires. This gives users the convenience of biometric unlock without bypassing your enterprise identity controls.

How much data can the local SQLite database handle on a mobile device?

Modern mobile devices comfortably handle SQLite databases up to several hundred megabytes, which typically translates to millions of records depending on field complexity. We implement data retention policies that keep the most relevant data locally and archive older records server-side. For users who need access to very large datasets, we implement on-demand fetching with local caching so frequently accessed records are instant while less common queries go through the API.

Mobile App Development

React Native companion apps for data-intensive SaaS platforms — offline-capable sync engines, biometric authentication, and push notification systems that keep field users connected to your real-time data.

React Native with offline-first sync engineBiometric authentication (Face ID, fingerprint)Background data sync and conflict resolutionPush notification campaigns via FCM and APNsSecure local storage with encryption at restShared business logic layer with web platform

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Mobile Apps for Data-Intensive SaaS: Offline Sync, Biometric Security, Real-Time Connectivity

Data-intensive SaaS products face a unique mobile challenge: your users need to access, capture, and act on data in environments where connectivity is unreliable. Field engineers inspecting equipment, logistics teams scanning in warehouses, sales reps reviewing analytics on the move — they all need the data your platform provides, but they cannot wait for a stable Wi-Fi connection to get it. We build React Native companion apps with robust offline sync engines, biometric security, and intelligent data caching that keep your mobile users productive regardless of network conditions.

The Offline Sync Architecture

Most mobile apps treat offline as an error state — showing empty screens and retry buttons when connectivity drops. For data-intensive SaaS, offline capability is a core feature that requires its own architecture.

Local-First Data Layer: We build a local SQLite database on the device that mirrors the subset of server data relevant to each user. The app reads from and writes to this local store first, making the user experience identical whether online or offline. There is no "offline mode" toggle — the app simply works.
Conflict Resolution Engine: When multiple users modify the same record while offline, conflicts are inevitable. We implement configurable conflict resolution strategies — last-write-wins for simple fields, operational transform for collaborative data, and manual resolution queues for business-critical changes that require human judgment.
Background Sync with Delta Compression: When connectivity returns, our sync engine transmits only the changes (deltas) rather than full records, minimising bandwidth usage. Sync runs in a background thread so the user never waits for synchronisation to complete before continuing their work.
Selective Data Prefetching: Rather than syncing the entire dataset, we implement intelligent prefetching based on user behaviour patterns and role-based data scoping. A field engineer gets their assigned sites preloaded; a manager gets summary dashboards cached for offline viewing.

Security for Sensitive Mobile Data

When your SaaS data lives on a mobile device, the security model must account for device theft, shared devices, and data that persists beyond a user's session.

Biometric authentication: Face ID and fingerprint unlock integrated with your platform's authentication flow, with configurable re-authentication intervals for sensitive operations
Encrypted local storage: All cached data is encrypted at rest using the device's secure enclave, with encryption keys tied to the authenticated user session
Remote wipe capability: Administrators can remotely invalidate a device's local data cache through your admin panel, triggering a secure deletion on the next connectivity event
Certificate pinning: All API communication uses certificate pinning to prevent man-in-the-middle attacks on untrusted networks

Deliverables

A production React Native application designed specifically as a companion to your data-intensive SaaS platform.

React Native app with local-first SQLite data layer and background delta sync engine
Biometric authentication integrated with your existing identity provider
Configurable conflict resolution for concurrent offline edits
Push notification infrastructure with segmented campaigns and in-app notification centre
Encrypted local storage with remote wipe capability for enterprise compliance
App Store and Google Play submission with all compliance documentation

When Your SaaS Needs a Mobile Companion

Your platform serves users who spend significant time away from desks — field service teams, logistics operators, healthcare professionals, or sales teams travelling between client meetings. They need to view dashboards, capture data, receive alerts, and complete workflows without returning to a desktop. Your enterprise customers are requesting mobile access as a procurement requirement and your competitors already offer it. Or your web-based data capture workflows are creating friction for users who would be faster with a native mobile experience.

Why SaaS Development London for SaaS Mobile Apps

We have built offline-capable React Native applications for SaaS platforms processing millions of data points daily. Our engineers have solved the specific problems that emerge when mobile sync meets real-world conditions — intermittent connectivity causing partial syncs, conflict storms when field teams return to coverage simultaneously, and battery drain from aggressive sync schedules. We bring tested solutions to these problems rather than discovering them during your launch.

If your SaaS platform needs a mobile companion that handles data reliably in the field, book a free consultation and we will scope the sync architecture for your specific use case.

Frequently Asked Questions

We implement intelligent sync scheduling that batches changes and transmits during optimal conditions — when the device is charging, connected to Wi-Fi, or idle. Active sync during cellular use is limited to high-priority changes (user-initiated actions). We also use delta compression so only changed fields are transmitted, not entire records. For initial sync of large datasets, we implement progressive loading so the app is usable immediately with partial data while the full sync completes in the background.

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