Today’s Apps Gone Free: PDF Markup, Questerium, Spectrum Analyzer and More

Create, manage, and markup PDFs, explore a ruined town in search of abandoned children, and measure sound with today’s collection of apps and games.

All app prices are subject to change at any time and without notice regardless of stated free duration. Price changes are solely under the control of the developers.

iPhone:

Modern Labyrinth ($0.99 → Free, 19.3 MB): Go down the correct hole in Modern Labyrinth. It’s for anyone who enjoys tilt-based games.

Modern Labyrinth is casual gaming at its best. It doesn’t have a ton of bells and whistles. Just launch the game and get rolling. As with all labyrinth games, your job is to avoid falling down the wrong hole on your way to the highlighted one by tilting your iDevice. Try to move quickly and achieve the best time possible. The game includes 36 levels.

Modern Labyrinth is available for free for a limited time. It has a 4.5-star rating with a total of 53 ratings.

Questerium: Sinister Trinity, Collector’s Edition (Full) ($4.99 → Free, 729.0 MB): Explore a ruined town in search of two abandoned children in Questerium. It’s for fans of hidden objects games.

A mysterious meteor crash-landed in a small town, and three lifelong friends make the worst decision of their lives by choosing to use it for experiments. When things go wrong, the entire town needs to be evacuated, but two small children have been left behind. It’s up to you as the investigator to not only find the children but also destroy the machine harnessing the power of the meteor and bring the professor to justice. Along the way you’ll have to search 39 locations, hunt for objects in 17 scenes, and solve 21 brain-bending puzzles.

Questerium: Sinister Trinity, Collector’s Edition (Full) is available for free for a limited time. It has a 4.5-star rating with a total of 24 ratings.

Universal:

PDF Markup Ultimate – Annotate PDFs and Web Pages ($9.99 → Free, 95.0 MB): Create, manage, and markup PDFs with PDF Markup Ultimate. It’s perfect for those who need to get work done while on the move.

You’re able to import PDFs and photos via your favorite cloud storage services, Wi-Fi, the web, iTunes File Sharing, or from your photo library. You’re also able to capture photos right from within the app and quickly convert them into PDFs. You can then view your PDFs, or edit and add markups using a wide variety of tools including highlighters, freehand pens, sticky notes, text boxes, arrows, and shapes. PDFs can also be searched for in Spotlight with keywords, and organized by date, tag, or name.

PDF Markup Ultimate – Annotate PDFs and Web Pages is available for free for a limited time. It has a 4.5-star rating with a total of 501 ratings.

Photo Reminders ($0.99 → Free, 54.2 MB): Create clear visual reminders by snapping photos with this productivity app. It’s perfect for anyone who needs more than a long list of text reminders to ensure the job gets done.

It’s so much easier to recall important events and ideas when you can actually see them, which is why we’re recommending Photo Reminders. All you have to do is snap a photo of something related to the event or idea you want to recall later, and then add a title and note. The photo will be turned into a large thumbnail, which can easily be viewed, edited, and shared from the main screen. Additionally, Photo Reminders allows you to attach audio notes and alerts to all of your events and ideas.

Photo Reminders is available for free for a limited time. It has a 4-star rating with a total of 98 ratings.

Audio spectrum analyzer and dB (decibel) meter ($3.99 → Free, 59.4 MB): Measure sound with Spectrum Analyzer. It’s a handy tool.

With Spectrum Analyzer, you can find out if the environment you’re in has eardrum rupturing sound or is quiet as a whisper. The app is loaded with handy features including the ability to see maximum and minimum audio levels, multiple FFT sizes, three octaves, line and bar graphs, the ability to pause the graph, full screen mode, and so much more.

Audio spectrum analyzer and dB (decibel) meter is available for free today only (01/10). It has a 5-star rating with a total of 16 ratings.

iPad:

Questerium: Sinister Trinity, Collector’s Edition HD (Full) ($6.99 → Free, 1.1 GB): Explore a ruined town in search of two abandoned children in Questerium. It’s for fans of hidden objects games.

A mysterious meteor crash-landed in a small town, and three lifelong friends make the worst decision of their lives by choosing to use it for experiments. When things go wrong, the entire town needs to be evacuated, but two small children have been left behind. It’s up to you as the investigator to not only find the children but also destroy the machine harnessing the power of the meteor and bring the professor to justice. Along the way you’ll have to search 39 locations, hunt for objects in 17 scenes, and solve 21 brain-bending puzzles.

Questerium: Sinister Trinity, Collector’s Edition HD (Full) is available for free for a limited time. It has a 4.5-star rating with a total of 199 ratings.

That concludes today’s issue of Apps Gone Free. If you like staying on top of these daily deals, don’t forget to check out our free AppsGoneFree app. It provides all the deals each day, and even an archive of past deals that are still active.

Developers:

If you are a developer who would like to get your app included in our “Apps Gone Free” daily lists, here’s our basic set of rules:

It must have at least a three-star average rating at the time it goes free.
The app must not have been free numerous times (3+) over the last six months.
The free version of your app must not include ads.

To submit an app, simply send a request to tyler@appadvice.com with the subject “Apps Gone Free.” Please include the name of the app, a link to it in the App Store, when and for how long you intend to offer the app for free, and anything else you would like to share. We will take it from there.