RPN Calculator 48 vs ELCON smartACCESS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RPN Calculator 48
This app offers a scientific calculator with Reverse Polish Notation (RPN) functionality, providing an alternative to the default calculator. It features a large, easy-to-read display, a 100-entry stack, and extensive undo/redo capabilities. Its design is inspired by classic HP calculators.
- Reverse Polish Notation (RPN)
- Scientific calculator functions
- Swipe gestures for undo/redo
- 100 entry stack
- 6 memory buttons
- State saving on exit
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RPN Calculator 48 is a polished RPN replacement for Apple's calculator app: - Same scientific functionality as Apple's calculator app* - Use swipe gestures to undo and redo operations! - Starts quickly - Large buttons - Easy-to-read display - 100 entry stack - 6 memory buttons (A-F) - 50+ levels of undo/redo - Saves state on exit The ergonomics (screen and keyboard layout) of RPN Calculator 48 were inspired by HP's outstanding 48-series calculator. RPN Calculator 48 is made by the developer of tChess (the critically acclaimed iPhone chess game) and Learn Chess (the Apple Staff Favorite e-book). * This app is not an HP 48 emulator.
ELCON smartACCESS
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we can provide a Bluetooth key to replace the traditional physical key. You can also generate new Bluetooth keys or keyboard passwords and send them to the visitors via phone, to remotely control your locks.
Screenshots
Verdict
The clearest difference is price: ELCON smartACCESS at Free against RPN Calculator 48's $3.99. ELCON smartACCESS also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
ELCON smartACCESS is free to download; RPN Calculator 48 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RPN Calculator 48 ships an update every 14 months, ELCON smartACCESS every 15 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | RPN Calculator 48 | ELCON smartACCESS |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.8 (238 ratings) — better | — |
| Positive reviews | 95.9% of reviews | — |
| Number of ratings | 238 — better | — |
| Update frequency | Every 14 months — better | Every 15 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPod, Apple Watch — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 339 MB |
| Age rating | 4+ | 4+ |
| Developer | Tom Kerrigan | ELCON Sicherheitstechnik GmbH |
Bugs and requests
RPN Calculator 48
Reported bugs
1 issue- Display issues in landscape mode on iPad
Requested features
3 requests- Add haptic feedback for key presses
- Implement ability to recall previous calculations from stack
- Improve landscape mode support on iPad
ELCON smartACCESS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
RPN Calculator 48
No in-app purchases
ELCON smartACCESS
No in-app purchases
Questions
Is RPN Calculator 48 free?
Is ELCON smartACCESS free?
Do RPN Calculator 48 or ELCON smartACCESS have ads?
Which is updated more often, RPN Calculator 48 or ELCON smartACCESS?
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