Beyond A/B Testing: Dynamic Feature Flagging in Native Apps

Features shouldn't just be "On" or "Off"—they should be Dynamic. Most feature flagging tools for mobile still require a native binary rebuild or a complex client-side merge to change actual logic. AppSpacer breaks this cycle by allowing you to update the feature logic itself instantly.

Runtime Logic Inversion

Because AppSpacer allows you to update the JavaScript layer, you can ship complex feature experiments that involve changing the actual logic, not just a toggle. For example, you can switch an entire payment gateway implementation OTA to test reliability without a store submission.

The useSpacerFeature Hook

Our SDK provides a powerful way to manage these experiments directly in your components:

// Logic-level feature flagging
const { isEnabled, config } = useSpacerFeature("new-checkout-v2");

if (isEnabled) {
  return ;
}
return ;

Atomic Segmentation & Targeting

AppSpacer for Features allows you to target users based on granular attributes:

• App Version: Target only users on v4.2.0+.
• Device Capabilities: Enable high-perf features only for iPhone 15 Pro+.
• Custom Attributes: Segment by 'Subscription Tier' or 'Region'.

Progressive Rollouts: Mitigating Risk

Start by enabling a new feature for 1% of your users. If the performance metrics hold steady, increase to 10% then 50%. This "Blast Radius Management" ensures that even a failed experiment never affects more than a fraction of your user base, and can be killed instantly with a single click in the AppSpacer dashboard.