Sheet1Calc vs RPN Deck
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Sheet1Calc
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Stop creating βSheet1β just for quick math. Sheet1Calc gives you a small 4x5 grid for quick calculations without creating another file. It includes simple templates such as: β’ Split Bill β’ Unit Conversion β’ BMI β’ 1RM β’ Currency Conversion Designed for temporary calculations.
RPN Deck
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RPN Deck is a reverse Polish calculator built for speed β and for fixing mistakes without starting over. EVERY NUMBER STAYS EDITABLE On most calculators one wrong digit means clearing the lot and typing it again. Here every value stays on screen. Tap a row to correct it in place. Swipe a row away to delete it. Undo steps back through anything you did. RPN, PROPERLY Type a value, press ENTER, type the next one. No parentheses. No equals key. No expression to hold in your head and get wrong three terms later. The stack is unlimited and every level of it stays visible. FAST Four functions and a percent key. TOTAL folds the whole stack into one number in a single press. Nothing is buried in a menu, because there are no menus. THE FULL DECK β a one-time in-app purchase Three ways in, one unlock. The Tape prints every keystroke like a receipt β each entry, each operation, each total β and shares as an image, text, or PDF. Scan points the camera at a receipt so you tap printed amounts straight onto the stack. Voice lets you speak numbers and they land where you'd type them. Family Sharing is supported, so one purchase covers your family group. SIMPLE ON PURPOSE No scientific functions. One surface, and everything on it does something. PRIVATE BY DEFAULT No account. No sign-in. No analytics, no tracking, no advertising. Nothing leaves your phone unless you share it yourself. iPhone, portrait, English.
Screenshots
Verdict
The clearest difference is in-app purchases: Sheet1Calc at none against RPN Deck's 1. RPN Deck's advantage is update cadence (every 11 days vs every 5 weeks) and iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. RPN Deck sells 1 one-off in-app purchase. Sheet1Calc asks for nothing beyond the download.
Sheet1Calc ships an update every 5 weeks, RPN Deck every 11 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.
| Parameter | Sheet1Calc | RPN Deck |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | Every 11 days β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 26.0 | 18.0 β better |
| Further details β not scored | ||
| Size | 8 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Shunsuke Takanishi | Edgard Leo Berendsen Mercado |
In-app purchases
Sheet1Calc
No in-app purchases
RPN Deck
- Full Deck$2.99









