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Subtracting Sardines HD

By Marcel Widarto

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★ Golden App Award -,
"I have NEVER formally taught my five-year-old subtraction, and she GETS Subtracting Sardines. Right from her very first go at it, all the way up to nines, even the negative numbers! She’s currently scoring 100% in this app, which blows me away"

★ We are Featured on the MWA's Banner Program.

★ "With the help of one friendly penguin, and a whole lotta sardines, practicing subtraction goes from boring to fun. Help your children practice subtraction skills on-the-go with this vibrant, kid-friendly app" - Best Apps for Kids,

★ "I found Subtracting Sardines and Adding Apples to be clever takes on Math manipulatives and a fun way to teach basic addition and subtraction skills" - The iPhone Mom,

★ "Another wonderful app from the makers of 'Adding Apples' " - Technology in Education,

★ "We recently reviewed the Adding apples so when we were told about this, we are curious to know how they handle the subtraction. They did managed to pull this off with flying colors." - Technology in Education,

★ "Subtracting Sardines HD is definitely worth purchasing for children beginning to learn subtraction. Children will have fun and conceptually learn the principles of subtraction from this app" -

Subtracting Sardines is a fun learning experience with appealing and interactive 3D graphics. This new software is highly intuitive and with many elements to explore, discover and learn! The natural and logical interaction will help your child to develop a solid understanding of basic mathematics.

● Solve math subtraction from 1-9 right up to 9-9
● Count from -8 to 8, both visually and verbally (US English)

● Develops Conceptual Understanding
● Builds Confidence

( For variation and to make sure all numbers are used and in different combinations, current keys are marked as done on correct subtraction. When all keys are marked they will reset )

● iOS 5, 6 Compatible
● all iPad devices
● iPad Mini

● Also available on the Mac App Store

● Interacting with the Sardines (real 3D physics)
● Interacting with the earned Gold Coins (real 3D physics)
● Seeing how Penguin reacts to various user input
● Exploring appealing animations and sounds
● Receiving a Gold Coin for each correct answer
● Collecting Gold Coins, and working towards 3 different trophies
● Seeing statistics on your collected Gold Coins and Sardines
● Put the Sardines into ice blocks while counting them
● Brush remove fish bones while counting them

● Reset all
● Automatic Clear and Plus keys - On/Off
● Music - On/Off
● Fullscreen Toggle

Additional statistics for the teacher/parent:
● Accuracy
● Accuracy History on each achievement
● Correct subtractions
● Incorrect subtractions


Recommended Ages: 4-7, 8-10, parents

Support us by writing a review or rating the app! Your feedback is much appreciated! If you have any other questions, please contact us directly at:


“Subtracting Sardines HD”:

- Does not collect or share any personal data.
- Does not contain any ads.
- Does not contains In App Purchases
- Does not contain Social Network Integration
- Includes external links to our developer page on App Store, Facebook and Twitter pages
- Includes external link to our support email

What's New in Version 1.2.1

✓ Improved multi-user
✓ Changed keypad graphics

iPad Screenshots

iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPad Screenshot 5

Customer Reviews

Engaging and educational

I love adding apples and when I started a subtraction unit I was excited to see Subtracting Sardines. It's a very simple concept but kids will play for hours. My only problem is that it allows kids to take away a larger number than they started with. Red sardines appear and the answer is a negative number. For a visual approach this doesn't work. It would be fine if we were hopping on a number line, but my first Graders don't understand that when you are dealing with real objects you can't take away more than you started with. Please add an option to lock negative numbers and I would give it 5 stars.

Wish this was around when I was little...

The modular approach of this app series is perfect. Switching apps helps our daughter visualize that we are doing a different concept, which is so helpful when first learning. It's great that the sardine visual is so different than the apples, because it really helps my daughter understand that it's a different process being performed. She thoroughly enjoys the graphics and giggles while learning math--how often does that happen!

Good but needs some improvements

First of all, as some were saying, there is no option to block negative numbers. Second, unlike the multiplication, the user is not able to see the math problem above the answer. For example, in multiplication, there is 2x3 above the answer of 6, but in substraction answer of 3, there is no explanation of 5-2, something like that. I think being able to see the math problem is important rather than just the answer. So please fix them and i'll give you 5 stars. Thank you.

Subtracting Sardines HD
View In iTunes
  • $2.99
  • Category: Education
  • Updated:
  • Version: 1.2.1
  • Size: 17.9 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 3.2 or later. Compatible with iPad.

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