Engineering must
I’ve been using this for many years in my work. Love it. Except, this week, the entire screen started to blink. Is there a fix?
Retro 15C
Published by:
Greg Hewgill
Description
Students and scientists from the 1980s will remember the classic RPN scientific calculators. These calculators strike a perfect balance between functionality and complexity.
* Complex number arithmetic and trig functions
* Matrix calculations
* Numerical root finder
* Numerical integration
* Statistical functions, linear regression
* Fully programmable
This app is completely free, no ads or extra bits to buy. I love this calculator and I like to share.
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* Complex number arithmetic and trig functions
* Matrix calculations
* Numerical root finder
* Numerical integration
* Statistical functions, linear regression
* Fully programmable
This app is completely free, no ads or extra bits to buy. I love this calculator and I like to share.
Screenshots
Retro 15C FAQ
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Is Retro 15C free?
Yes, Retro 15C is completely free and it doesn't have any in-app purchases or subscriptions.
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Is Retro 15C legit?
✅ The Retro 15C app appears to be high-quality and legitimate. Users are very satisfied.
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How much does Retro 15C cost?
Retro 15C is free.
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What is Retro 15C revenue?
To get estimated revenue of Retro 15C app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.
User Rating
3.75 out of 5
4 ratings in Mexico
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Ratings History
Retro 15C Reviews
Fantastic
If you know, you know…
An Old Friend now on my phone
Near perfection. The only thing I wish they would do is to add haptic feedback on the keyboard. Well done , guys.
Still working on iOS 18
Just like the original calculator that I used as I got my PhD in physics. The best by HP.
My go to calculator for years
After a few bumps with the loss of a home button, this is back. Thank goodness!
Still works in 2024!
Good job future-proofing the app!
I use it every day
I love this app. One minor issue is that with the loss of the home button, it’s not so easy to close the app. It’s hard to get the skinny bar to turn white. I’d also like a click sound when I touch a key.
Excellent for a free RPN HP-15C calc
This is still my default calc in my iPhone. I even deleted the iOS calc !!!!
Way back machine to college days
I absolutely love this calculator! I started with a 25c for electronics. I now have an 11c and a 16c. This is my favorite go to calculator now. It is perfect for RPN users. Love it, love it, love it!
App will not close- iOS 17.0.3
Been using this app for years, you could always close it by swiping it off the screen. Once it’s on an iPhone with no Home button, you can’t exit the app. The only way to exit the app and get back to the icons is a hard off (power + volume up button)
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App Info
- Category
- Utilities
- Publisher
- Greg Hewgill
- Languages
- English
- Recent release
- 1.1 (7 years ago )
- Released on
- Dec 15, 2012 (12 years ago )
- Also available in
- United States, Canada, Australia, France, Germany, Sweden, Denmark, Switzerland, United Kingdom, Netherlands, Norway, Brazil, Japan, Italy, Spain, Mexico, China, Russia, Finland, New Zealand, Austria, Hong Kong SAR China, Belgium, Algeria, Greece, Singapore, Ireland, Israel, Chile, Taiwan, South Africa, Vietnam, Philippines, Pakistan, Poland, Portugal, Romania, Ukraine, Slovenia, Saudi Arabia, Türkiye, Thailand, India, Hungary, Argentina, Azerbaijan, Belarus, Colombia, Czechia, Dominican Republic, Ecuador, Egypt, Peru, Indonesia, United Arab Emirates, South Korea, Kuwait, Kazakhstan, Lebanon, Malaysia, Nigeria
- Last Updated
- 4 days ago
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