BUILT INTO EVERY GOODSPEED APP
Biometric Lock (Face ID / Touch ID)
A configurable re-authentication timeout gates the app behind Face ID or Touch ID on every foreground resume, with no extra backend calls. The check is local and completes in under 200ms.
- Tier: Common
- Status: Config-toggled
- Config: features.auth.biometric.enabled
WHY IT MATTERS
Most mobile app projects spend weeks plumbing the same infrastructure before writing a single line of product code. Biometric Lock (Face ID / Touch ID) is one of those cross-cutting concerns that every app eventually needs but almost none get right the first time. Permissions are handled incorrectly, tokens expire silently, or the feature breaks after an OS update nobody tested against.
Goodspeed solves this by shipping biometric lock (face id / touch id) as a production-grade, tested implementation inside every generated app. The code follows the patterns in the GAS template - the same 246-feature catalog that powers every app we build. Controlled by `features.auth.biometric.enabled` in gas.config.ts. You own the code from day one, can read every line, and can hire any React Native developer to extend it. The build pipeline verifies the feature compiles and routes resolve before the app lands in your repository, so you are not the one catching the integration error at 2 am before launch.
HOW IT IS WIRED
Real code from the GAS template
The excerpt below is lifted verbatim from gas.config.ts in the gas-template repository. This is the code your generated app gets, not pseudocode, not a description of intent.
// Enable this feature in gas.config.ts
export const gasConfig = {
features: {
// Set the relevant flag to true to enable
},
};Source: goodspeed-apps/gas-template → gas.config.ts
HONEST LIMITS
When Biometric Lock (Face ID / Touch ID) is the wrong choice
Skip for apps where users frequently switch between accounts on a shared device, since biometric lock assumes single-owner usage.
Tier: Common · Config-toggled
Evaluate your use case
Check whether biometric lock (face id / touch id) aligns with your target audience, platform constraints, and regulatory environment before enabling it.
Audit the config
The `features.auth.biometric.enabled` flag controls this feature. Set it to false in gas.config.ts to disable the feature entirely with no residual code paths.
Seek alternatives
If the built-in implementation does not fit, the generated codebase is standard React Native + Expo code. Any library in the Expo ecosystem can replace the default.
APPS USING THIS FEATURE
Every generated Goodspeed app includes biometric lock (face id / touch id). Browse the ideas catalog to see apps across all categories that ship with this feature wired in.
CAPABILITIES
Biometric Lock (Face ID / Touch ID) capability breakdown
Concrete dimensions of what the built-in biometric lock (face id / touch id) implementation covers. These reflect the actual template code, not a marketing summary.
| Item | Description | Strength |
|---|---|---|
| Storage backend | Data for this feature is managed by expo-secure-store (last-auth timestamp, keyed on-device). | expo-secure-store (last-auth timestamp, keyed on-device) |
| Network mode | This feature operates in N/A mode. | N/A |
| Sync frequency | Data syncs N/A. | N/A |
| Tier | Common feature — config-toggled. | Common |
| Template status | Enabled via features.auth.biometric.enabled. | Config-toggled |
GET IT BUILT INTO YOUR APP