Designing “Memory Rescue” With OneSignal (Without Turning Slovo Into a Notification Machine)

Push notifications are easy to send and difficult to deserve.

Slovo is a Russian learning app built around a deliberately small habit: one useful word, a short review, and optional reading. If I used notifications to manufacture urgency every few hours, the messaging system would undermine the product it was supposed to support.

So the retention question became:

Can Slovo identify a useful unfinished memory task, invite the learner back at a sensible time, and stop immediately when the task is complete?

I call the first OneSignal experiment Memory Rescue.

This article describes the implementation and campaign design. At the time of writing, the production result is still [NOT YET MEASURED]. I am separating architecture from outcome because an integrated SDK is not evidence that a campaign works.

What the App Knows

Slovostores learning progress locally. It does not need to send a person’s current Russian word or...

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