We get more positive feedback surrounding our posts on paid iPhone and iPad apps that go on sale for free than for any other content series we run. We appreciate all of the tweets, Facebook messages and emails you guys send in, and we’ll keep doing our best to highlight the top paid iOS apps that go on sale each day.

Today’s list features eight terrific apps, and a few more paid apps can be had for free if you head back to yesterday’s post, where you’ll find a few good sales that haven’t yet ended.

DON’T MISS: This simple trick could have a big impact on your iPhone’s battery life

These are paid iPhone and iPad apps that have been made available for free for a limited time by their developers. There is no way to tell how long they will be free. These sales could end an hour from now or a week from now — obviously, the only thing we can guarantee is that they were free at the time this post was written. If you click on a link and see a price listed next to an app instead of the word “get,” it is no longer free. The sale has ended. If you download the app, you will be charged.

Optics

Optics

Normally $0.99.

Optics is a design tool for zooming into photos and getting color values, distance measurements, and precision cropping.

Color Picker
– get RGB, HSL, or HSB values of individual pixels
– zoom into the photo for full detail
– loupe available for fast precision

Rectangle Selection & Crop Tool
– crop your photo to any size, down to the pixel
– precisely measure dimensions
– for flat images, remove the background to isolate the foreground element

Rulers
– see the x and y locations of every measurement

Download Optics

Marathon & Half Marathon Trainer PRO

Marathon-&-Half-Marathon-Trainer-PRO

Normally $4.99.

Get this app if you want to train for a half marathon or marathon.
Important: the application will only suit those who can run 10К.
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TRAINING PROGRAM:
– 2 training plans: half marathon (21К) and marathon (42К);
– gradual step-up of workload;
– ready-made 3-month & 4-month training plans with 4 workout days a week;
– detailed instructions for every day of the program (even with no runs scheduled);
– suitable for out- and indoor running.

EASY WORKOUT MODE
– GPS running map;
– audio instructions to each training;
– detailed running statistics;
– easy access to music, audio books and podcasts right from the app;
– calorie counting;
– manual editing of workouts.

STAY MOTIVATED
– dozens of tips on running, healthy nutrition and lifestyle;
– synchronization with Apple Health app.

SHARE ON FACEBOOK & TWITTER
– share your achievements, running stats and even routes with your friends.

Download Marathon & Half Marathon Trainer PRO

123QWERTY

123QWERTY

Normally $0.99.

Assignable & customizable keyboard for the iPhone and iPad starting from iOS 8. Letters, numbers, symbols plus your own personal phrases can now be together on one convenient screen. You can even enter phrases in another language.
123 QWERTY is an on-screen keyboard that lets you assign the keys your way. Spend less time swapping screens to write your message.
DESIGN YOUR KEYBOARD
There are 2 extra rows added above the QWERTY keyboard. The top row has 10 fully customizable keys. You can choose to customize the keys with your preferred symbols or custom phrases. Such as greetings, sign offs, signatures and more. The next row added is the number row, no longer necessary to switch screens to enter alphanumeric characters.
CUSTOMIZE THE TOP ROW TO YOUR LIKING
Now there are only 2 screens and you have the ability to place your most common symbols on the first screen to minimize switching back and forth between screens.
SAVE TIME-TYPE QUICKER
With only 2 keyboard screens-type faster, less switching between screens.
EASY NUMBER ENTRY WITH HANDY NUMBER PAD
Landscape mode for the iPhones places the number pad on the right side of the keyboard for convenient number entry. The iPads has the number pad on the right side for all modes-Portrait & Landscape.
YOU DECIDE – YOUR KEYBOARD – YOUR CHOICE
Bring speed and efficiency to your texting and emails.

Download 123QWERTY

Aura

Aura

Normally $2.99.

▶ #1 PHOTO EDITOR!

Snap, Edit & Share your photos, easier than ever!
Our powerful and beautifully designed tools will help you add beautiful frames, filters, text and so much more to your photos, in the most creative & playful way ever!

• High-Quality Filters
Apply stunning filters to your photos, easier than ever! Choose between a beautiful collection of stunning filters to make your photos achieve the specific look and glow you want.
We will continually be adding more filter packs for your photos to enjoy!

• Stunning Effects
Choose from a perfectly categorized collection of stunning effects such as Spot, Bloom & Gloom to easily make your photos stand out!

• Beautiful Text
Simply add beautiful text to your photos with many artistic fonts to choose from. Express yourself, with the most perfectly designed text editing tool for your phone!

• Artistic Frames & Borders
Add beautiful frames and borders to your photos, easier than ever! Tons of designs to choose from, all for free!

• Simple Sharing
Share your favorite photos with your friends in just 1 tap! Our simple sharing features, allows you to post your pics to Instagram, Facebook, Twitter or whatever social network you use, faster than ever!

Tag your photos on Instagram with #AuraCam and follow @AuraCamera for a chance to be featured on our official Instagram

Download Aura

Cleaner Pro

Cleaner-Pro

Normally $1.99.

* Over 1,500,000 people love Cleaner :)

* Easily Remove Duplicate Contacts! *

MAIN FEATURES
○ Find & Merge duplicate contacts!
○ Remove contacts without name or phone number
○ One tap to backup your contacts!
○ Quickly find the contacts you need

Your contacts are the most important data in your phone which easily becomes messy if not consistently updated.
Cleaner easily helps you detect and merge duplicate contacts.

SIMPLY MERGE DUPLICATE CONTACTS
○ Find & Merge duplicate contacts!
○ Find & merge contacts with similar names.
○ Find & Merge contacts with duplicate phone or email.

CLEANUP
○ Remove contacts without name
○ Remove contacts without phone & email

BACKUP
○ One tap to backup your contacts!
○ Quickly export your backups to Dropbox, Google Drive, Email
○ Move contacts between accounts (Exchange, iCloud, Local Address Book)

SMART FILTERS
○ Quickly find the contacts you need
○ Filter contacts by Company & Job title
○ Filter contacts by upcoming birthday & creation date

AVAILABLE IN 15 DIFFERENT LANGUAGES
English, Español, Français, Italiano, Deutsch, Português (Br.), 中文 (Simplified), 中文 (Traditional), 日本語, 한국어, Nederlands, Русский, Türkçe, العربية, עברית

Do you think your address book is well organize?
You will be surprised how ‘Cleaner’ can upgrade it!

Download Cleaner Pro

iPacking

iPacking

Normally $2.99.

iPacking is an excellent and funny packed app. The app can help you pack your luggage and handle any type of trip you take. Whether you are going to business trip, taking a vacation, going camping or just a road trip. Even more wonderful was that the app lets you more like packed.
Feature:

– A great “Pack Now” option to help users efficiently complete their packing list, while they use simple and intuitive gestures to navigate through each item.
– A database of over 340 possible travel items, plus the option to add an unlimited number of items.
– A database of various travel templates – such as camping, business trip, and so on – that can be customized to fit each user’s current and future requirements.
-The ability to create an unlimited number of lists and categories to easily manage the packing duties for any kind of trip — whether it’s across the city, or on the other side of the world.
– A handy filter to see items that are packed or unpacked.
– Social integration to share packing lists with family, friends and colleagues via Facebook, Twitter or email, so they can confirm that the packing list is complete.
– An “Unpack All” option for travelers who are essentially repeating the same trip, and want to ensure that they take the same items.
– Show only items that are packed, unpacked, or show them all.
– Edit item number.
– Add the item to a new or existing category.
– Copy List : when you need to create a similar one.
– Easier edit items for rearrange, rename, change the category and move them.
– Print your list directly to a printer.
– Save list as template.

iPacking isn’t only for trips. Create lists for shopping, Todo and other miscellaneous tasks.

Download iPacking

Scientific Calculator

Scientific-Calculator

Normally $2.99.

NOW FOR FREE to celebrate the Apple Watch! – Optimized and tested on 38mm and 42mm models! You can do basic calculations, tip calculations, unit and currency conversions and even scientific calculations directly on your wrist. Designed with large keys for best usability on the small screen.

The SC-323PU is a multi functional calculator. It is designed in a way, that it simulates the visual and operational aspects of a true pocket calculator, such that the user will be immediately familiar with its interface. A complete operation manual is included within the App.

The SC-323PU offers the following calculator modes for different tasks:

– SCIENTIFIC CALCULATOR
– UNIT CONVERTER and UNIT CALCULATOR
– LOGIC CALCULATOR (n-base conversion)

• Full operating instructions are included in the App (visible when device is in landscape orientation).
• All modes share the same memory contents, and calculation value, so that the different calculator modes can be used in one calculation task.
• Pasteboard support (copy and paste)
• Algebraic logic for calculation entry.
• Priority of calculations according to a given mathematical formula.
• 30 levels of parentheses or pending operations.
• Variables and memories to store values and use in calculations.
• Floating decimal point calculations with 20 digits mantissa and 2 digits exponent.
• Calculations: Four arithmetic calculations, constant calculation, memory calculations, trigonometric and inverse trigonometric functions, hyperbolic and inverse hyperbolic functions, conversion of angles and time, reciprocals, square roots and cubic roots, X-th roots of Y, squares and powers, logarithmic and exponential functions, factorials, permutations, combinations, conversions of coordinates.
• Complex number calculations.
• Different display modes selectable: floating point decimal, fixed point decimal, scientific notation and engineering notation.
• DEG/RAD/GRAD selector key.
• Fraction calculations.
• Time calculations.
• Frame rate calculations.
• Unit converter and currency converter.
• Calculations with mixed units.
• The calculator is shipped with 84 physical units and 16 SI prefixes predefined.
• Exchange rate of currency units will be updated automatically from internet.
• Additional units can be defined by user.
• Single and two lines view modes optimized for different conversion tasks.
• Conversions between 4 base systems HEX, DEC, OCT, BIN.
• Boolean operations AND, OR, XOR, NOT, bit shift operations.
• Conversion from “little endian” to “big endian” format and vice versa.
• Handling of 8, 16, 32 and 64 bit signed and unsigned numbers including overflow calculations.

Download Scientific Calculator

CoolPlayer

CoolPlayer

Normally $0.99.

– This is the smartest, simplest and easiest to use music player app out there;

– Use simple gestures to control which songs will play;

– Customize the app with several available themes, including iPhone 5C specific themes;

– The iSmartPlayer is the ideal app to play your songs at any time!

All songs’ lyrics supplied by Vagalume

Download CoolPlayer

Lumen Trails Time Tracker

Lumen-Trails-Time-Tracker

Normally $19.99.

• Apple “New Year, New You” Favorite
• Apple App Store Staff Favorite

Lumen Trails is an omni tracker. It lets you take notes, make lists and keep track of other things in your life, such as time, workouts, expenses, calories, food, weight, sleep or anything else you can think of. Thousands of people use it every day, and they love it because it truly makes a difference in their lives.

“I’ve been using Lumen Trails for 6 months and continue to love it. One of my most sticky and useful apps ever on my phone.” – David D’Souza

The beauty of Lumen Trails is that you can track absolutely anything. There are tons of other apps that allow you to track one or two things, for example, calories and weight. But what if you decide to track something else? Say, how many cigarettes you smoke as you try to quit, your eating habits or even net worth? Lumen Trails is the app for that!

Instead of having one app for your to-do lists, one for tracking expenses, another one for tracking your weight, you can declutter your home screen and just have one app that does it all.

Designed exclusively for the iPhone, iPod touch and iPad, Lumen Trails is incredibly powerful, easy to use, and looks beautiful on the Retina HD Display. It can even backup your data automatically to Google Drive, sync with iCloud, and is fully accessible with Apple VoiceOver in 8 languages. There’s nothing that comes even close to it. And to top it all, your data is not locked on your iPhone. You can export it to Excel or Google Docs!

So what’s truly important to you right now? Your Health? Fitness? Finances? Productivity?

Track it and get things done!

:: Note to iPhone 6 & 6 Plus users

Now you can ask Siri to find information for you and dictate right into Lumen Trails. For example, hold down the Home button and ask Siri: “How many calories are in a chicken sandwich?”. To start dictation, tap the microphone button on your keyboard and just start talking – your words will be turned into text.

Download Lumen Trails Time Tracker

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