Greg is a fast-pace math addition app that can be a good tool for strong math students to improve their speed and flexibility with numbers, but it could easily make other students feel anxious or overwhelmed. Players begin with a 4x4 grid of easy-to-read numbers. They tap any combination of numbers to equal the target sum, at which point a new target sum appears and they repeat the process. Players continue in this fashion, trying to scan and find the right combinations before time runs out and the game is over. As they are successful players will progress to higher levels, achieve higher scores, and earn power-ups to use during game play. As time runs out the numbers begin to shake, and students are buzzed for incorrect combinations. There are six levels of difficulty but the primary difference is the speed of play. Overall, this app can effectively build fast-paced numeracy skills, but it could leave students feeling uncomfortable and unsuccessful if this is not their area of strength.

• Provides sufficient and varied types of practice problems to maximize understanding and generalization of the targeted skill/concept
• Manufacturer claims alignment with Common Core/Known Standards
• Presents educational concepts accurately
• Explains answers so students can learn from mistakes
• Better for teaching the skill to new or struggling learners
• Better for practicing or refreshing the skill
• Skills are practiced through authentic, meaningful problems (not just rote practice)

• Appropriate for a broad age range to use and enjoy
• Subject matter and problems are relevant, interesting and authentic to students
• Visually appealing to children in the target age range
• Provides virtual rewards or incentives after meeting specified goals or objectives
• Provides a "break activity" between academic problem sets
• Offers ongoing, progressive challenge
• Overall - Enjoyable. Given the option, students would choose this option

• Has a free or trial version
• Provides teaching guidance for adults to support the child and set appropriate goals
• Provides an age-appropriate tutorial/first time users can work independently
• Student should be able to use independently after first use
• Has a multi-player option to foster in-person collaboration or cooperation
• Multiple users can save a profile
• Student graduates to the next level or topic only after meeting a benchmark
• Can play without sound and not distract others
• Students can save work between sessions
• Can effectively understand and monitor student's progress (email report or in product)
• Provides options to play in languages other than English/Good for ELL
• Presents information in multiple formats (voice over, pictures and text, etc.)
• Overall - Easy to use

• Anxiety
• Age inappropriate amount of work which could overwhelm or discourage students
• Gives negative feedback (red X's, buzzer)
• A player's success depends on speed
• Timer cannot be hidden
• Turn or quiz abruptly ends when timer runs out
• Numerical Fluency
• A player's success depends on speed
• Turn or quiz abruptly ends when timer runs out
• Organization
• Age inappropriate amount of work which could overwhelm or discourage students
• Problems or examples are not interesting for the target age range
• Directions may be confusing for students using independently
• Processing Speed
• Requires scanning in multiple places for words, objects or numbers
• A player's success depends on speed
• Timer cannot be hidden
• Turn or quiz abruptly ends when timer runs out
• Self-regulation
• Gives negative feedback (red X's, buzzer)
• A player's success depends on speed
• Turn or quiz abruptly ends when timer runs out
• Visual Discrimination
• Requires scanning in multiple places for words, objects or numbers
• Visually distracting with too many pictures, problems or moving objects
• Visual Motor Speed
• A player's success depends on speed
• Timer cannot be hidden
• Turn or quiz abruptly ends when timer runs out
• Working Memory
• Requires scanning in multiple places for words, objects or numbers
• Directions may be confusing for students using independently
• Turn or quiz abruptly ends when timer runs out

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• Apple Best New Games
• #1 Puzzle Game App
• “A puzzle game that will test your speed and math skills, a gameplay mechanic both invigorating and challenging.” - AppAdvice
• “An excellent, fun way to kickstart the grey matter.” - Gamezebo
• “A solid game with nice graphics, good gameplay and a practical learning.” - AppGefahren.de

WHAT OUR USERS SAY
• Polished interface. Mentally beneficial and challenging gameplay. What else do you want?
• Extremely addicting and fun game. Who knew that adding numbers could be so exciting!
• Very fun game and it really helps me with my math skills. One of my favorite downloads.
• If you love numbers, this is for you. If not, you will learn to love numbers!
• In no overstated terms, I'm obsessed with the game. I hate phone games. But GREG is inescapable.
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Do you think additions are easy?
Challenge yourself and play GREG, a simple mathematical game that will enhance your mental flexibility!
The main purpose of the game is to combine the numbers in the grid to match the given one. The more you go ahead, the more difficult the game will become.


GAMEPLAY
Simple and addictive gameplay, suitable for both quick and long-lasting matches.
The better you play the more points and gold you earn!

ITEMS AND SPELLS
Need some help? Use special items and spells to help you in the game!
You can easily get more items by using the gold you earn within the game.

MULTIPLAYER
Challenge your friends like never before in an innovative multiplayer mode!
Show your friends who is smarter by defeating them in a game where cleverness, reflexes and strategy combine.
Multiplayer is available only on iPhone 4S or newer.

GAME CENTER
Climb the leaderboards and prove you are the best player!
And if you feel good enough try to earn all the 35 engaging and unique achievements.

UNIVERSAL
Enjoy GREG on your iPhone and your iPad too, so you can test your mathematical skills in every moment.

ICLOUD
All your progress and game stats are synced between all your devices, so you don’t have to worry about having different data on your iPhone and your iPad.


SPECIAL NOTES
• Follow @playGREG on Twitter for the latest!
• Have a problem? Want to give us a feedback? Remember: we can't respond to App Store reviews, so email us at greg@marcotorretta.com
• Developed in collaboration with Stefano Figurelli.

Have fun playing GREG!