Adding Machine 10Key Univ Lite vs Rapid & Quick Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Adding Machine 10Key Univ Lite
This app emulates a traditional 10-key adding machine for precise calculations. It offers features like reversed operator entry, percentage calculation, and the ability to edit and save paper tape files. The iPad version includes a full-size keypad with audio feedback for enhanced accuracy.
- 10-key adding machine emulation
- Reversed operator entry
- Percentage calculation
- Paper tape editing and saving
- Export paper tape files
- TypeTone audio feedback (iPad)
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'Adding Machine 10Key Univ Lite' 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. This universal version works with both iPhone and iPad. 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 (iPad or iPhone) 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). 'Lite' Version Description ================== This is the full version of Adding Machine 10Key Univ, but with a reduced number of paper tape lines & other limitations. You can find the full version by searching for 'Adding Machine 10Key Universal' by Richard Silverman in the App Store. ==== 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, or your favorite printing utility. . TypeTone - a major innovation to aid accurate key entry using audio feedback (iPad version). . Full size (1:1) keyboard (iPad version). . Select from a menu of keypad sounds. . 400 lines of paper tape history (full version). . 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 (iPad version) ================ FAQ's Q1. What is the difference between 'Adding Machine 10Key Univ', 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). ============================ INCLUDED IN THIS LITE VERSION: . 16 lines of paper tape history . Limited to 2 keypad sounds . Only save 2 paper histories to disk . Ads for Interlocken products at bottom of display UPGRADE TO THE FULL VERSION IN THE APP STORE 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
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).
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Verdict
The clearest difference is rating: Rapid & Quick Calculator at 4.8 against Adding Machine 10Key Univ Lite's 4.3. Rapid & Quick Calculator also leads on ratings volume (1.5K vs 192) and review sentiment (91% vs 80%). Adding Machine 10Key Univ Lite's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 5 months). On price, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Rapid & Quick Calculator holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Rapid & Quick Calculator has 1.5K ratings behind it against 192, so its average is the more settled of the two. Written reviews point the same way: 80% of Adding Machine 10Key Univ Lite's written reviews are positive against 91% of Rapid & Quick Calculator's.
Adding Machine 10Key Univ Lite ships an update every 6 weeks, Rapid & Quick Calculator every 5 months. The most recent releases landed on August 26, 2026 and September 25, 2026 respectively.
| Parameter | Adding Machine 10Key Univ Lite | Rapid & Quick Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (192 ratings) | 4.8 (1.5K ratings) — better |
| Positive reviews | 79.6% of reviews | 90.5% of reviews — better |
| Number of ratings | 192 | 1.5K — better |
| Update frequency | Every 6 weeks — better | Every 5 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.4 — better | 17.6 |
| Further details — not scored | ||
| Size | 23 MB | 7 MB |
| Age rating | +4 | 4+ |
| Developer | Richard Silverman | KinkumaDesign |
Customer experience
Adding Machine 10Key Univ Lite
Rapid & Quick Calculator
Bugs and requests
Adding Machine 10Key Univ Lite
Reported bugs
4 issues- 3 digits get frozen during calculations
- Crashed and lost data
- The "don't ask again" button for reviews does nothing
- App freezes when switching apps
Requested features
8 requests- Ability to set automatic cents
- Two sales tax rates or ability to deselect items from tax
- More lines in the free version
- More screen space on iPhone
- Ability to add more before clearing
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- Unlimited tape length
- Dark mode option
- One-button clear tape option
Rapid & Quick Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Adding Machine 10Key Univ Lite
No in-app purchases
Rapid & Quick Calculator
No in-app purchases
Questions
Is Adding Machine 10Key Univ Lite free?
Is Rapid & Quick Calculator free?
Which has better reviews, Adding Machine 10Key Univ Lite or Rapid & Quick Calculator?
Do Adding Machine 10Key Univ Lite or Rapid & Quick Calculator have ads?
Which is updated more often, Adding Machine 10Key Univ Lite or Rapid & Quick Calculator?
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