Check the acquisition promise
Read the store headline, screenshots and description. What problem is the app promising to solve?
Study the storefront ↗02 / Storefront & product
Where the click lands.
Study the product story and store experience behind the acquisition funnel.
Screenshots
03 / Market context
The business behind the app.
Keep revenue, downloads and store rankings separate from advertising performance.
How Much Does GO-21 SciRPN Make?
Monthly Revenue
$1.0K
Annualized estimate
$12.0K
Per Download
$1.00
Platform Performance
🍎iOS
Revenue
$1.0K
Downloads
1.0K
Rating
4.9 ★(12)
Rating Distribution
4.9
★★★★★
12 reviews
5
0%
4
0%
3
0%
2
8%
1
92%
Top Countries
🇮🇹 IT🇫🇷 FR🇺🇸 US
Reviews (3)▼
★★★★★Rbollo536/15/2022
50 years later - Thank you
Many thanks for giving me the opportunity to use this RPN calculator. I bought my very first HP 21 C in 1972 when studying at Polytechnic School of Cameroon. 50 years later, I am still very happy and proud using RPN devices and programming Common LISP.
★★★★☆Dhjdhj1/11/2020
Hate that high visibility setting
To me, the value of this app (and all the other RPN apps that I have) is the authenticity of them. Otherwise, there are a gazillion calculators with different sized displays out there with RPN. Instead of making the X view high visibility, why not enlarge the calculator itself to be full screen (even getting rid of the stack view optionally) Then I’ll go back to 5 stars again which otherwise this app absolutely deserves.
★★★★★NanoRon9/7/2018
Lean & Mean
I’ve been using this app for a number of years and have been very satisfied and figured it was time I gave it a review. As an engineer, I loved my HP-21 and was sad when it finally died many moons ago. I searched and searched for a simple reverse Polish calculator app, but could never find a good one. This is a good one. A clean but elegant emulation of a classic design. Highly recommended.
Version History (58)▼
7.19/17/2024
7.05/15/2024
6.6.33/9/2024
6.6.12/22/2024
6.62/18/2024
6.59/14/2022
6.42/19/2022
6.312/20/2020
6.2.110/14/2020
6.210/4/2020
Available In (115 Countries)▼
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Supported Languages (1)▼
English
App Details▼
GO-21 SciRPN simulates the venerable HP-21 Pocket Scientific Calculator from 1975. Virtually indistinguishable from the real item in operation, GO-21...
Publisher
Steve Lidie
