CalCollections vs my15c
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
CalCollections
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This app allows users to organise their calculators into collections. The app uses tailored options to register the calculators and as much information possible about them. With CalCollections you can have all your calculator collections in one place.
my15c
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my15C is a faithful emulation of the classic 15C ā the legendary RPN scientific programmable calculator, running the original Voyager-series microcode ROM, cycle-accurate. Built for engineers, scientists, and RPN enthusiasts who want the real thing in their pocket ā not just a look-alike. FEATURES ā¢ Authentic 15C ROM emulation ā same logic, same quirks as the original 1982 hardware ā¢ Full RPN entry with a 4-level stack ā¢ Complex number arithmetic ā¢ Matrix operations ā¢ Numerical integration (ā«f(x)) ā¢ Root solving (SOLVE) ā¢ Full programmability ā write, edit, and run your own programs ā¢ Continuous memory with iCloud sync across your devices ā¢ Authentic 7-segment LCD display and keyboard layout ā¢ Landscape-optimized for iPhone, iPad, and Mac
Screenshots
Verdict
The clearest difference is in-app purchases: CalCollections at none against my15c's 1. CalCollections also leads on iOS requirement (18.4 vs 26.0). my15c's advantage is update cadence (every 2 days vs every 4 weeks). On price, ads and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. my15c sells 1 one-off in-app purchase. CalCollections asks for nothing beyond the download.
CalCollections ships an update every 4 weeks, my15c every 2 days. The most recent releases landed on September 18, 2026 and September 14, 2026 respectively.
| Parameter | CalCollections | my15c |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks | Every 2 days ā better |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, Mac ā better |
| Requires iOS | 18.4 ā better | 26.0 |
| Further details ā not scored | ||
| Size | 2 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | The Calculator Store SLNE | Miroslav Perovic |
In-app purchases
CalCollections
No in-app purchases
my15c
- Unlock Full App$9.99
