App Store search, with price history
Find the right app at the right price.
- Real App Store prices
- Price history and drops
- No account needed
From AppSift's price checks
Price drops
Apps whose price went down in the last two weeks.
Straight from Apple's charts
Top charts
Today's App Store charts.
Saved in this browser
Watchlist
Apps you're keeping an eye on, with what changed since you added them and since your last visit.
Saved in this browser only. AppSift for Mac keeps a watchlist that checks prices every few hours, subscriptions included, and alerts you when one drops.
Compare
Up to three apps side by side. Add apps with “Compare” on their pages.
Contact
Questions, bugs or ideas, about AppSift on the web or on the Mac.
Memorize Prime Numbers
Oscar Tsang
- Price
- Free
Price history
Tracked since Oct 9, 2026. Lowest Free on Oct 26, 2026, highest $4.99.
- Oct 26, 2026 Free
- Oct 9, 2026 $4.99