This customizable screen darkening app for those of us with sensitive eyes will usually run you about a buck. Shop Now at Google Play
New subscribers to Apple Music can get six months for just $2.99. (That's a one-time payment, not $2.99 a month.) We've seen up to four months free, but this is the best price we've seen for a 6-month subscription — a savings of $63 overall.
To see if you're eligible, follow the "Entertainment" tab in the top menu of their store to the Apple Music section. You should see this limited time offer advertised there. After the six months are up, the subscription will auto-renew at its then-normal monthly price (currently $10.99), but you can cancel before then to avoid paying.
This deal was good enough to make our roundup of the top five best deals of the day. Follow that link to see our latest selection. Buy Now at Apple