Khan Academy’s new iPad app offers over 150,000 interactive lessons along with special features like handwriting recognition.

If you’re unfamiliar with Khan Academy, it’s a nonprofit that creates really good educational content for completely free.

"Launching our iPad app is an important step toward meeting learners where they're at on the platforms they're using most,” said Khan Academy Product Manager Matt Wahl. “We took lots of time to consider crafting the best possible experience on the iPad, including highly interactive content, expansive handwriting recognition, and a design that puts our best content at finger's reach. After working with many learners to understand and hone the experience, we're excited about the role this can play in learning for students around the world."

Available on: iPad

Price: Free

Download: App Store

This entry is brought to you by WonderApps, maker of ATracker.

If you've ever wanted to make better use of your time, you should try ATracker, a simple and minimalist time-tracking app from WonderApps. ATracker lets you start and stop tracking your work and leisure activities with a single tap. It produces eye-catching bar charts or pie charts showing how your time is spent, and your complete data log can be exported in CSV format.

It takes only seconds to define your activities, since a name and/or an icon is all you need, and the app also provides many rich features like color coding, UI customization, timer, etc. The latest release of ATracker also supports a Notification Center widget in iOS 8.

Available on: iPhone/iPad

Price: Free — offers in-app purchase to upgrade to PRO version

Download: App Store

If you want a much cheaper solution than 1Password for managing your logins and private info on the Mac, LastPass is worth checking out.

You get password syncing across devices, account autofill, profiles for autofilling more complex web forms, secure notes, folder organization for free. A LastPass Premium subscription removes ads, unlocks support for corporate verification tools like Yubikey, adds shared family folders, and unlimited access to the mobile app.

Available on: Mac

Price: Free (optional $12/year Premium subscription)

Download: App Store

This week Spotify introduced some cool new features for previewing and saving music.

Touch Preview allows you to tap and hold on any track to immediately start a 30-second preview. From there, just swipe to save it to your collection or queue it up. Lifting your finger stops the playback, and you can scroll through a playlist to preview multiple tracks with one tap.

Pretty slick, and Spotify is somehow managing to add it without pushing an official App Store update. Stay on the look for it showing up; it’s rolling out now.

If you’d like to see Touch Preview in action, check out this video.

Available on: iPhone

Price: Free

Download: App Store

How about the weather with some sass? Thanks to Funny Or Die, there’s an app for that.

The app can show you 5-day forecasts, barometric pressure, wind speed, humidity, UV Index, moon phases, and tides, but let’s be honest: you could use any old weather app for that stuff. You want the jokes, and this app delivers.

(Powered by Weather Underground, in case you were wondering.)

Available on: iPhone

Price: Free

Download: App Store