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 Halcyon Calc 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 ★(18)
Rating Distribution
4.9
★★★★★
18 reviews
5
0%
4
0%
3
0%
2
11%
1
89%
Top Countries
🇮🇹 IT🇫🇷 FR🇩🇪 DE
Reviews (3)▼
★★★★★confusedbankuser5/22/2022
Great simulator of a great calculator and a great app
This is truly one of the best. Faithful reproduction of the HP-28S, the first user RPL calculator, that keeps all the good stuff and improves on the not-so-good (the display, for example, is so much better than that on the actual calculator). Stable and well thought out, with a very polished look. The plotting capabilities are pretty amazing. Very responsive developer; helped me immediately with a workaround to a minor problem and released an update within a few days. Allows me to do anything I used to do with my old 28S, and without the creaking plastic clamshell case sound! Highly recommended and worth every penny of the price. Hope to see more from this developer.
★★★★★tmcquade8/18/2020
Best Calculator out there
Love how responsive Halcyon Software is to fixing and improving this software. My favorite change on this release is the long or 3D press to get the red shift key. My 28S still runs perfectly but the battery door is so fragile. I can use Halcyon Calc all the time.
★★★★★Muskego Dave5/12/2019
It works better than I had hoped!
My HP 28S calculator (the best programmable scientific calculator ever built) is back! Thanks so much! I took a rather complicated engineering program from my 28 (which used some rather esoteric functions), laid it in, and it ran perfectly! Two thumbs WAY up! More if I had them.
Version History (32)▼
4.35/6/2026
4.2.1010/8/2025
4.2.95/4/2023
4.2.83/17/2023
4.2.711/21/2022
4.2.65/21/2022
4.2.54/8/2022
4.2.34/12/2021
4.2.23/10/2021
4.2.19/18/2020
Available In (115 Countries)▼
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Supported Languages (1)▼
English
App Details▼
For students, engineers, scientists or people who fondly remember classic calculators, Halcyon Calc is a great application for manipulating numbers an...
Publisher
Halcyon Touch Software
