Early PMF Signals

The signal

Up to 40 min study sessions in first launch.
We built something teenagers preferred to use —
67% returned for a second study session next week.
The product is fitting a real study habit:
PM deep, AM quick review.

What students said

Outcome validation "

Estonian test felt easy, I was the first one to hand it in in the classroom. I think your app is part of the reason.

Sofia · Quest 1 · 40 min session

Value prop "

It helped me study because it was like some kind of game and since it was on my phone (quick access) I had motivation to do it.

Laura · Quest 1+2 · 26 min total

Product signal "

I forgot to do the quick review the second time, before the History test. I'd like the app to always send notifications 30 min before the test, to remind me about the 1-minute-summary.

Aksi · Quest 2 · 5 min session

Retention Quest 1→2

67%

4 of 6 students who opened Quest 1 came back for Quest 2

Avg Study Time / Quest

~18 MIN

Avg per engaged student, Quest 1 (Estonian)

PM + AM Sessions

3/4

3/4 students studied PM +AM

New behavioural pattern emerged from a timed notification

What happened

Week 1 · Thu Feb 12 · Estonian Language Quest 🇪🇪

First group quest sent via Snapchat

Quest link sent to the Snapchat study group the day before a major Estonian language exam. All 6 students opened it. 4 engaged meaningfully — longest session: 40 minutes across PM + AM. Average time per engaged student was ~18 minutes. 3 of 4 returned AM for revision. 2 bounced under 30 seconds. Founder sent a "wishing you luck!" nudge 10 min before the test.

Week 2 · Mon Feb 16 · History Quest 📚

Second quest, same group

Second quest link sent the day before a History exam. 4 of 6 students opened and engaged — zero bounces. Average time per engaged student was ~8 minutes. No nudge sent this time. Fewer students returned AM for revision compared to Quest 1, consistent with the nudge driving that behavior. One student who bounced on Quest 1 returned for 7 minutes PM and came back AM — converted by peer social proof.

Engagement by student

Sofia

50 min total

Laura

26 min

Loore

12 min (Quest 1 only)

Aksi

9.5 min

Anz

7 min

Adeele

30 sec (bounced)

Behavioral patterns worth noting

PM Study + AM Revision

A Natural Study Ritual

3 out of 4 engaged students on Quest 1 did a PM study session then returned for a quick AM revision before the test. Nobody was instructed to do this.

Bounce → Full Engagement

Social study group retains

One student bounced on Quest 1 (30 seconds) but returned on Quest 2 for 7 minutes PM — then came back AM for revision. Peer social proof drove re-engagement without any direct prompting.

Session timing

High-Intent Windows Only

Sessions cluster tightly around test windows: PM 17:00–23:12 and AM 07:00–09:48. Aksi studied at 11pm. This is deliberate, high-stakes study behavior — not casual browsing.

Nudge effect

AM Revision Is Nudge-Driven

Quest 1 (week 1): founder sent "wishing you luck!" to the group 10 min before the test — 3 of 4 students returned AM for revision. Quest 2 (week 2): no nudge sent — 1 of 4 returned AM. 3× difference. The nudge mechanic validated itself across the first two weeks.

Joyed.ai · Early PMF Report · Feb 2026 n=6 students · Weeks 1–2 · Biweekly · Confidential