Chris Aljoudi has Purify Blocker: The Best, Simplest, and Fastest Blocker for Safari (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for 99-cents (regularly $3.99) for a limited time.

No ads, no tracking. Purify works seamlessly with Safari — right out of the box.

Purify is a content blocker for Safari that blocks ads, tracking, and more. Purify’s engine is professionally hand-crafted to optimize your browsing experience. With free regular updates, all users receive the best and latest of Purify. It instantly make your browsing up to 4x FASTER, reduce your data consumption on Cellular & Wi-Fi by up to 50%, browse the web clutter-free — restore precious screen space taken up by junk, ultimate privacy: Purify never intercepts or sees any of your traffic.

Acqualia has Soulver Notepad Calculator (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for 99-cents (regularly $4.99) for a limited time.

Soulver is the ultimate app for doing quick calculations and figuring stuff out on the iPhone & iPad. It’s a far more elegant way to work with numbers than a traditional calculator.

With Soulver, you write out your entire problem and you see your answer as you type. If you make a mistake, you don’t have to start again, you can edit your expression like in a text editor.

You can do calculations over multiple lines, and change any of them. You can use words alongside your numbers so they make sense which it’s great for comparing different scenarios.

Soulver is great for adding things up, and doing quick percentages. Soulver will also save your work for you when you’re done, and sync it using iCloud or Dropbox.

Once you try Soulver, you’ll never want to go back to a simulated physical calculator.