Adding Machine 10Key for iPad vs Rapid & Quick Calculator Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Adding Machine 10Key for iPad
This app emulates a traditional 10-key adding machine with advanced features for iPad users. It offers a full-size keypad with audio feedback, editable paper tapes, and multiple export options for your calculations.
- Traditional 10-key adding machine emulation
- TypeTone audio feedback for accurate typing
- Editable paper tape with add/delete lines
- Save and retrieve paper tape files
- Export tapes to PDF via iBooks, Dropbox, or email
- Sharp or Canon style total key placement
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'Adding Machine 10Key for iPad’ behaves like a true '10 Key' or 'adding machine' like those made by Monroe, Casio, Sharp and others. Press asterisk (*) for a total, operator entry is reversed, and calculate percentages by multiplying and adding to a stream of numbers. SEE THE 1ST FAQ BELOW. The iPad version features a full sized (1:1) keypad with TypeTone, a unique audio aid to help guide your finger back to the center of a key. The total (*) key can be on either the left or right side (Sharp or Canon style). Also. Review & edit numbers, add or delete lines. Save & retrieve paper tape files. Export paper tape files to iBooks©, Dropbox©, or your favorite printing utility (see the FAQs). ==== Recent Press ===== Has been featured in iTunes "What's Hot" in the Finance Category. Strategic Finance (Tools of the Trade): "If you're looking for a professional desk calculator that can give you full 10-key accounting functions with a tape you can name and save, edit, e-mail, or print, check out Interlocken's 10 Key for iPad." ================= Specifications: ================= . Behaves the same as a '10 Key' adding machine. . Export a PDF file to iBooks©, DropBox©, Email, and print with your favorite printing utility. . Use Apple AirPrint© to print directly. . TypeTone - a major innovation to aid accurate key entry using audio feedback (iPad version). . Full size (1:1) keyboard. . Select from a menu of keypad sounds. . 400 lines of paper tape history. . 3 display formats: fixed, fix+, float . Save paper tapes to disk for later use. . Correct numbers, add comments, add/delete lines . Two keypads offer the 'total' key on the left or right (Sharp or Canon style) . Comprehensive set of help screens. . 3 Orientations: Landscape Left/Right + Portrait ================ FAQ's Q1. What is the difference between 'Adding Machine 10Key for iPad, and 'Accountant Calc' in the App. Store.? A1. Both calculators are single-column adding machines or calculators with full-size (1:1) keypads and are optimized for the iPad User Interface. '10 Key' behaves the same as a 10 Key Adding Machine with reversed operator entry while ‘Accountant Calc’ supports free chaining of +, -, x, /, %, √, 1/x. It is easier to use if you are not familiar with how a '10-key' works. Q2. Can I touch-type? A2. The iPad version comes as close to touch-typing as a touch-screen can be. With ‘TypeTone’, a key will guide your finger back to the center of a key with an audio tone. Q3. How can I edit an incorrect number or add & delete lines from the paper tape? A3. Touch any line of the paper tape for edit mode. Touch the side controls: Add Line, Delete Line. You can also edit numbers, split Add/Sub or Mul/Div groups. Press Done to return to Calculator mode. Q4. Tell me about Email, Printing, and Exporting a Paper Tape. A4. Email includes a pdf attachment. Print requires an AirPrint capable printer. Open-In will cause a menu of 3rd party Apps to appear. Once exported, print directly to a network reachable printer (even if it is NOT AirPrint capable). ============================ TERMS AND CONDITIONS Your use of this application is governed by Interlocken Technology's Terms of Use (http://s354819480.onlinehome.us/InterlockenPrivacyPolicy/Interlocken%20Technology%20Privacy%20Policy.pdf) and Privacy Policy (http://s354819480.onlinehome.us/InterlockenPrivacyPolicy/InterlockenTechnologyTermsOfUse.pdf)
Rapid & Quick Calculator Pro
This calculator app offers essential functions plus advanced features like sales tax and discount calculations. Easily reuse past answers, edit expressions with cursor keys, and customize themes and fonts. Share your calculations with others.
- History tape for reusing answers
- Sales tax and discount calculations
- Precise rounding settings
- Editable expressions with cursor keys
- Multiple color themes and font options
- 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!
Screenshots
Verdict
The clearest difference is ads: Adding Machine 10Key for iPad at none against Rapid & Quick Calculator Pro's shown. Adding Machine 10Key for iPad also leads on update cadence (every 2 months vs every 5 months) and price ($2.99 vs $3.99). On rating, review sentiment, ratings volume 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
Adding Machine 10Key for iPad costs $2.99 and Rapid & Quick Calculator Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.8 for Adding Machine 10Key for iPad against 4.9 for Rapid & Quick Calculator Pro. Both are backed by a comparable volume of ratings — 77 and 206 respectively. Written reviews are what separate them: 92% of Adding Machine 10Key for iPad's written reviews are positive against 90% of Rapid & Quick Calculator Pro's.
Adding Machine 10Key for iPad ships an update every 2 months, Rapid & Quick Calculator Pro every 5 months. Both last shipped on October 22, 2026.
| Parameter | Adding Machine 10Key for iPad | Rapid & Quick Calculator Pro |
|---|---|---|
| Price | $2.99 — better | $3.99 |
| Rating | 4.8 (77 ratings) | 4.9 (206 ratings) — better |
| Positive reviews | 92.4% of reviews — better | 90.1% of reviews |
| Number of ratings | 77 | 206 — better |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 12.4 — better | 17.6 |
| Further details — not scored | ||
| Size | 22 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Silverman | KinkumaDesign |
Customer experience
Adding Machine 10Key for iPad
Rapid & Quick Calculator Pro
User reviews
Adding Machine 10Key for iPad
From 77 App Store ratingsWhat we love
- 👍 Mimics traditional adding machines
- 👍 Familiar interface for 10-key users
- 👍 Virtual paper tape for record-keeping
- 👍 Saves and emails tapes
- 👍 Portable and convenient
Room to improve
- 🤔 Takes time to get used to
- 🤔 Keyboard input issues reported
- 🤔 Memory limitation for very large numbers
- 🤔 Not a true 3D key feel
Rapid & Quick Calculator Pro
From 206 App Store ratingsWhat we love
- 👍 Easy to use
- 📜 History feature is helpful
- 📋 Copy and paste functionality
- ✨ Customizable appearance
- ✅ Clear display of calculations
Room to improve
- 🐛 App crashes on paste
- 🐛 Random calculations appear
- 🐛 Laggy input on startup
- 🐛 iPad bug with screen switching
- 🐛 Swipe responsiveness issues
Bugs and requests
Adding Machine 10Key for iPad
Reported bugs
2 issues- Memory doesn't go past six figures
- Cannot use memory to calculate GST and VAT values efficiently
Requested features
5 requests- Ability to dictate numbers and operations verbally
- More functions like Tax+, Tax-, MU
- Ability to write notes beside numbers
- Dark mode option
- Make it more intuitive
Rapid & Quick Calculator Pro
Reported bugs
8 issues- App crashes when pasting copied expression and pressing equals
- Random calculations appear in current box after clearing and reopening
- Laggy drawing of input on startup
- App becomes unusable on iPad after screen switching
- Swipe response is poor
Show 3 moreShow fewer
- Sound effects stopped working despite being enabled
- History is lost when switching to background and returning
- Paid version tax buttons are not functional
Requested features
11 requests- Dark mode for icon
- Larger calculation display window
- Separate tax buttons (pre/post tax)
- Vibration option for input
- Add memo to history
Show 6 moreShow fewer
- Sort history by newest
- Button for billions/ten millions
- Square root function
- Setting for decimal places
- Setting for decimal marks
- Continuous calculation without equals
In-app purchases
Adding Machine 10Key for iPad
No in-app purchases
Rapid & Quick Calculator Pro
No in-app purchases
Questions
Is Adding Machine 10Key for iPad free?
Is Rapid & Quick Calculator Pro free?
Which has better reviews, Adding Machine 10Key for iPad or Rapid & Quick Calculator Pro?
Do Adding Machine 10Key for iPad or Rapid & Quick Calculator Pro have ads?
Which is updated more often, Adding Machine 10Key for iPad or Rapid & Quick Calculator Pro?
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