OtaKitA/B testing Capacitor apps with live update channels
Run real experiments in production without a store release. How to A/B test Capacitor apps using live update channels and feature flags, measure the result, and promote the winner with OtaKit.
A/B testing a mobile app used to mean two store submissions and a two-week wait to learn anything. With over-the-air updates you can run a real experiment in production and act on the result the same day. This guide covers two ways to A/B test a Capacitor app with OtaKit: channel-level splits and in-bundle feature flags.
Approach 1: channel-level A/B
Put a slice of users on a channel carrying variant B while everyone else stays on A. Because your app chooses the channel at runtime, you control the split:
import { OtaKit } from '@otakit/capacitor-plugin';
// deterministic 50/50 split by a stable user id hash
const inVariantB = hash(user.id) % 2 === 0;
await OtaKit.setChannel({ channel: inVariantB ? 'experiment-b' : 'production' });Release variant B to experiment-b, measure, and when a winner emerges, promote it to production for everyone. See targeting users with channels.
Approach 2: in-bundle feature flags
Ship both variants inside one bundle, gated by a flag, and assign users to a variant client-side. This keeps everyone on one channel and is simpler to reason about for UI-level experiments. The OTA angle is that you can flip the flag, add a variant, or kill the experiment with a new bundle — no store release. See feature flags in Capacitor apps.
Rule of thumb: use channels when the variants differ enough that you'd rather not carry both in every bundle; use flags for lightweight UI/copy experiments where both fit comfortably in one build.
Measuring the result
An experiment is only as good as its instrumentation. Emit an event tagging each user's variant, then track your success metric per variant in whatever analytics you already use. The update lifecycle events (updateApplied, etc.) also let you confirm the variant actually reached the device — see Events and monitoring OTA updates.
Promote the winner
When the data is clear, promotion is one command — you ship the winning bundle to production without rebuilding, and retire the losing variant. This close-the-loop speed is the real advantage of experimenting over the air. See channel promotion.
Where to go next
Combine this with staged rollouts so even the winning variant ramps up safely, and read Channels & runtime version for the mechanics.