Openings worth building — measured, not guessed.
Klaibel tracks apps in 18 App Store markets every week and shows where demand is proven but the local market is unserved, incumbents are weak, or nobody has used AI yet.
This week’s top openings
See all openingsThe first openings are computed on Monday 26 October 2026.
How it’s measured
Starting this week
Read the App Store every week
Top charts, ratings, languages and update dates, from Apple’s public listings.
18markets
Compare each market with the US and UK
Apps are grouped into niches. Proven demand in the US and UK is set against how each European market is served.
Starting this week
Score every niche in every market
Six measured parts add up to one score out of 100. Every formula is published.
How the score works, with every formula and what the data can’t tell you.
Three openings, every Monday
A free email with the week’s three highest-scoring openings and one line of evidence for each. Unsubscribe from any of them.
Pricing
One plan, with a 7-day trial. It opens the full evidence behind every opening.
Klaibel
€9/ month + VAT
7-day trial, card required. Cancel before it ends and nothing is charged.
- Every opening, with full evidence
- Filter by market, type, demand and competition
- Save your parameters
- Watchlist and a weekly email when an opening moves
- CSV export
- Site lists for every AI vendor
Without a plan you can browse every opening, its score and its top three competitors, and get the free weekly email.
AI on websites
Klaibel also keeps a directory of the AI vendors websites run. Look up any site, or browse the vendors.