Lump vs my15c
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Lump
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Display the contents of (almost) any file in hexadecimal and ASCII or UTF-8. Useful for programmers, experimenters, and explorers. Handles huge files easily.
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: Lump at none against my15c's 1. Lump also leads on iOS requirement (18.6 vs 26.0). my15c's advantage is update cadence (every 5 days vs every 3 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. Lump asks for nothing beyond the download.
Lump ships an update every 3 weeks, my15c every 5 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.
| Parameter | Lump | my15c |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 5 days ā better |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, Mac ā better |
| Requires iOS | 18.6 ā better | 26.0 |
| Further details ā not scored | ||
| Size | 1 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | David Rifkind | Miroslav Perovic |
In-app purchases
Lump
No in-app purchases
my15c
- Unlock Full App$9.99
