ChessUnlock vs Previewer
Neck and neck on boosts. Profiles, pricing and deals below.
ChessUnlock
A chess puzzle on every unlock
community boosts
⚡ 0
pricing
Freemium
what it is
A chess puzzle every time you unlock your Mac. 5M+ tactics from Lichess, adaptive Elo rating, streak tracking. Improve at chess passively. macOS app.
Previewer
Discover the brands everyone will know next
community boosts
⚡ 0
pricing
Freemium
what it is
Independent reviews, emerging brands, and genuinely interesting products — curated by Previewer before they hit the mainstream.