Devalluator Calculation Tool vs Rapid & Quick Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Devalluator Calculation Tool
Easily calculate various percentage-based financial scenarios with large buttons and hotkeys. Quickly determine discounts, original prices, and more, ideal for shopping or financial planning.
- Percentage off a value
- Percentage of a value
- Percentage on a value
- Calculate original price
- Large input buttons
- Hotkeys for quick selection
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Devalluator is a neat little app designed to make calculating percentages fast and simple. It uses large buttons to input values and hot keys to let you select the percentage you want to apply to a figure. Ideal for shopping environments when you just want to quickly find out the discount on that special pair of shoes and not wast time fiddling about with small buttons and complicated functions. The app can perform 5 percentage functions: -Percentage off a value -Percentage of a value -Percentage on a value -Original price before percentage was increased -Original price before percentage was reduced
Rapid & Quick Calculator
A user-friendly calculator with essential functions and advanced features like tax and discount calculations. Easily reuse past calculations or edit expressions with intuitive controls. Offers customization options for themes and fonts.
- History Tape for reusing answers
- Sales tax calculations
- Discount calculations
- Precise rounding settings
- Customizable themes and fonts
- Editable expressions with cursor keys
- Share expressions and answers
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Over 300,000 downloads worldwide! A fast, friendly calculator built for everyday use — shopping, splitting bills, household budgeting, and more. FEATURES * History Tape — review your past calculations and reuse any answer with a single tap * Expression Input — type the whole equation, just like you'd write it on paper * Sales Tax — toggle tax-included/excluded with a single button; swipe to switch between multiple tax rates * Percentage Discounts — e.g. 100 - 30% = 70 * Precise Rounding Settings * Multiple Color Themes * Multiple Font Sizes and Typefaces * Arrow Keys — move the cursor left or right to edit any part of the expression * Share — send expressions and answers to other apps * iPad Support — including Slide Over and Split View on supported devices * Sound Effects To reuse or edit an equation from your history, swipe left on it (or touch and hold) to open the menu. We'd love to hear your feedback! This is the free version. A paid version is also available — it removes ads and offers four tax keys (the free version has two).
Screenshots
Verdict
The clearest difference is price: Rapid & Quick Calculator at Free against Devalluator Calculation Tool's $0.99. Rapid & Quick Calculator also leads on ratings volume (1.5K vs 1) and update cadence (every 5 months vs every 10 months). Devalluator Calculation Tool's advantage is ads (none vs shown) and rating (5.0 vs 4.8). On 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
Rapid & Quick Calculator is free to download; Devalluator Calculation Tool costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Devalluator Calculation Tool holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Rapid & Quick Calculator has 1.5K ratings behind it against 1, so its average is the more settled of the two.
Devalluator Calculation Tool ships an update every 10 months, Rapid & Quick Calculator every 5 months. The most recent releases landed on June 25, 2026 and September 25, 2026 respectively.
| Parameter | Devalluator Calculation Tool | Rapid & Quick Calculator |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | 4.8 (1.5K ratings) |
| Positive reviews | — | 90.5% of reviews |
| Number of ratings | 1 | 1.5K — better |
| Update frequency | Every 10 months | Every 5 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | John Benson | KinkumaDesign |
Customer experience
Devalluator Calculation Tool
Rapid & Quick Calculator
In-app purchases
Devalluator Calculation Tool
No in-app purchases
Rapid & Quick Calculator
No in-app purchases
Questions
Is Devalluator Calculation Tool free?
Is Rapid & Quick Calculator free?
Which has better reviews, Devalluator Calculation Tool or Rapid & Quick Calculator?
Do Devalluator Calculation Tool or Rapid & Quick Calculator have ads?
Which is updated more often, Devalluator Calculation Tool or Rapid & Quick Calculator?
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