The only testing tool that writes your test plan — and has your own team run it from their phone.
For CTOs and technical co-founders at small startups shipping iOS and Android apps, with no one dedicated to testing.
No SDK to install
Testers open a link in their phone's browser. Nothing to build, nothing to ship.
No testers to hire
Your own team — the people already using the app — do the testing.
A professional test plan
Written for your app by a professional tester, not assembled by your team.
How a Séance works
Séance — French for a testing session. One trigger starts it, two emails keep it going.
A new Version is ready
The moment you're about to ship, the Séance starts.
The Séance email goes out
Testers get a link. They open it on their phone and start.
No Séance in 30 days? A reminder.
If a Version goes quiet, Crested Col nudges you before it's forgotten.
On fait la séance d'abord.
We always run the Séance first.
What the CTO opens
The first Bug from a completed Séance isn't “ça bug” in WhatsApp. It's steps, device, expected versus actual, and a capture — written by a tester who was simply told what to look for.
- Steps
- 1. Add item to cart. 2. Tap “Confirm”. 3. Wait for the confirmation screen.
- Appareil
- iPhone 13, iOS 17.4, Safari
- Expected
- A confirmation screen appears.
- Actual
- Nothing happens. No error, no screen.
- Capture

Describe your app. Get the full test plan.
The hard part was never finding testers — a small startup already has them. It's telling them what to test, and getting the report back in a shape anyone can use.
Replaces hiring testers.
One plan. €29 a month.
Describing your app and generating the full set of test scenarios is free. Paying unlocks inviting testers and running Séances.
- One app
- Unlimited testers
- Unlimited Séances