Comparison

Sheet1Calc vs RPN Deck

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Sheet1Calc

Features
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Stop creating β€œSheet1” 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.

About

RPN Deck

Features
Read full description

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

Sheet1Calc3 screens
RPN Deck4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. RPN Deck sells 1 one-off in-app purchase. Sheet1Calc asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard3 real differences Β· 3 level
Sheet1Calc versus RPN Deck: the parameters behind the verdict, then further details
ParameterSheet1CalcRPN Deck
PriceFreeFree
Update frequencyEvery 5 weeksEvery 11 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad β€” betteriPhone
Requires iOS26.018.0 β€” better
Further details β€” not scored
Size8 MB2 MB
Age rating4+4+
DeveloperShunsuke TakanishiEdgard Leo Berendsen Mercado

In-app purchases

None

Sheet1Calc

No in-app purchases

1 purchases

RPN Deck

One-time1
  • Full Deck$2.99

Questions

Is Sheet1Calc free?
Sheet1Calc is free to download, with no in-app purchases.
Is RPN Deck free?
RPN Deck is free to download, with in-app purchases available.
Do Sheet1Calc or RPN Deck have ads?
Neither Sheet1Calc nor RPN Deck shows ads.
Which is updated more often, Sheet1Calc or RPN Deck?
Sheet1Calc ships an update every 5 weeks, and RPN Deck every 11 days. Most recently, Sheet1Calc was updated on November 5, 2026 and RPN Deck on November 6, 2026.

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