Comparison

Adding Machine 10Key Universal vs The Motley Fool

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

Head to head
About

Adding Machine 10Key Universal

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 review and edit entries on a digital paper tape. Users can save, export, and print their calculation tapes.

Highlights
  • 10-key adding machine emulation
  • Reversed operator entry
  • Percentage calculation
  • Digital paper tape with editing
  • Save and export tapes (PDF)
  • TypeTone audio feedback (iPad)
Currently charting
Read full description

'Adding Machine 10Key Universal’ 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). ==== 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 (iPad version). . 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 (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). ============================ 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)

About

The Motley Fool

Access real-time stock rankings, recommendations, news, and analysis from The Motley Fool. Receive instant notifications about your portfolio, new stock picks, and expert commentary. Customize alerts or get comprehensive updates to stay informed about market insights.

Highlights
  • Stock rankings and recommendations
  • Portfolio tracking
  • Customizable notifications
  • Analyst commentary
  • Stock lookup and sentiment
  • Dashboard summary
Read full description

Introducing the official Motley Fool US mobile app. Stay on top of the latest stock rankings, recommendations, news and analysis from The Motley Fool with our app. Designed for, but not limited to, our US premium subscribers, the mobile app provides instant notification of: - Motley Fool coverage of stocks in your portfolios. - The latest rankings and new stock recommendations from your Motley Fool services. - New analysis and commentary from our analysts for all your Motley Fool services. Be the first to know the latest thinking and guidance from The Motley Fool. The Motley Fool app has a rich experience designed for your mobile device and contains a suite of features, including: - A dashboard summary of stocks you’re following and your Motley Fool services. - See the latest stock rankings and recommendations across your Motley Fool services. - Detailed information about the stocks you’re following with My Portfolios. - Either be selective and customize notifications to get alerts for specific stocks and services, or get the firehose and get notified about everything we do, it’s up to you! - Quick and easy navigation of your Motley Fool services. - A layout designed specifically for fast and clean reading on mobile. - Look up any stock to get our latest coverage and sentiment about the company. Download now and receive updates as we continue to make improvements and add features in the future. All subscription and purchases through the app are subject to the standard Apple End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

Adding Machine 10Key Universal4 screens
The Motley Fool4 screens

Verdict

The call

The clearest difference is review sentiment: Adding Machine 10Key Universal at 94% against The Motley Fool's 15%. Adding Machine 10Key Universal also leads on rating (4.7 vs 2.7) and in-app purchases (none vs 3). The Motley Fool's advantage is price (Free vs $3.99) and update cadence (fortnightly vs every 2 months). On ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

The Motley Fool is free to download; Adding Machine 10Key Universal costs $3.99 up front. The Motley Fool sells 3 in-app purchases, starting at $699.99 per 3 months. Adding Machine 10Key Universal asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Adding Machine 10Key Universal holds the better App Store score, 4.7 against 2.7. Both are backed by a comparable volume of ratings — 136 and 46 respectively. Written reviews point the same way: 94% of Adding Machine 10Key Universal's written reviews are positive against 15% of The Motley Fool's.

UpkeepUpdate frequency

Adding Machine 10Key Universal ships an update every 2 months, The Motley Fool fortnightly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

Scorecard8 real differences · 3 level
Adding Machine 10Key Universal versus The Motley Fool: the parameters behind the verdict, then further details
ParameterAdding Machine 10Key UniversalThe Motley Fool
Price$3.99Free — better
Rating4.7 (136 ratings) — better2.7 (46 ratings)
Positive reviews94.0% of reviews — better15.4% of reviews
Number of ratings136 — better46
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#168 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.4 — better16.4
Further details — not scored
Size23 MB102 MB
Age rating4+4+
DeveloperRichard SilvermanThe Motley Fool

Customer experience

Adding Machine 10Key Universal

All ratings136 ratings
Positive92.6%
Neutral1.5%
Negative5.9%
Written reviews50 reviews
Positive94.0%
Neutral0.0%
Negative6.0%

The Motley Fool

All ratings46 ratings
Positive34.8%
Neutral6.5%
Negative58.7%
Written reviews156 reviews
Positive15.4%
Neutral9.0%
Negative75.6%

User reviews

Adding Machine 10Key Universal

From 136 App Store ratings

What we love

  • 👍 Easy to use
  • 🧮 Acts like an adding machine
  • 🧾 Digital tape for review
  • 🖨️ Can print tape
  • 💾 Can save/export results

Room to improve

  • 🐛 Outdated and no support
  • 🐛 Doesn't work for new iPad
  • 🐛 Total only shows non-zero decimals
  • 🐛 Ridiculous method to clear tape
  • 🐛 % key not functional

The Motley Fool

From 46 App Store ratings

What we love

  • 🚀 Great content and insights
  • 👍 Useful portfolio tracking
  • 🚀 Convenient access to Motley Fool resources

Room to improve

  • 🐛 Frequent crashes and freezes
  • 🔍 Difficult to navigate and find content
  • 🔑 Frustrating login and authentication issues
  • 🔧 Poor app performance and responsiveness
  • 💰 Aggressive upselling and hidden fees

Bugs and requests

Adding Machine 10Key Universal

Reported bugs

11 issues
  • Cannot save taped
  • Cannot export results
  • Does not work for new iPad
  • Total only shows digits after the decimal that aren't zero
  • Method to clear the tape is ridiculous
Show 6 more
  • It does not subtract
  • No way to do handoff due to lack of iCloud syncing
  • % key does not appear to do anything
  • +/- key seems to be inoperative
  • See index button doesn't do anything
  • Review screen pops up every time the app is opened and 'don't ask again' doesn't work

Requested features

6 requests
  • Add widget
  • Add realistic sounds
  • Add iCloud sync
  • Improve tape clearing method
  • Clarify functionality of % and +/- keys
Show 1 more
  • Improve instructions for less intuitive features

The Motley Fool

Reported bugs

4 issues
  • Articles and recommendations not loading properly
  • Inability to cancel subscriptions through the app
  • Inconsistent behavior across iOS and Android versions
  • Lack of support for Canadian and international users

Requested features

5 requests
  • Improve login and authentication process
  • Enhance portfolio management and tracking features
  • Optimize app performance and stability
  • Streamline navigation and content discovery
  • Provide better integration with Motley Fool services

In-app purchases

None

Adding Machine 10Key Universal

No in-app purchases

3 purchases

The Motley Fool

Subscriptions3
  • Backstage Quarterly$699.993 Months
  • Everlasting: Boss Mode$799.003 Months
  • Fool Portfolios$999.003 Months

Questions

Is Adding Machine 10Key Universal free?
Adding Machine 10Key Universal costs $3.99, with no in-app purchases.
Is The Motley Fool free?
The Motley Fool is free to download, with in-app purchases available.
Which has better reviews, Adding Machine 10Key Universal or The Motley Fool?
Adding Machine 10Key Universal is rated higher. Adding Machine 10Key Universal averages 4.7 out of 5 from 136 ratings, while The Motley Fool averages 2.7 from 46 ratings.
Do Adding Machine 10Key Universal or The Motley Fool have ads?
Neither Adding Machine 10Key Universal nor The Motley Fool shows ads.
Which is updated more often, Adding Machine 10Key Universal or The Motley Fool?
Adding Machine 10Key Universal ships an update every 2 months, and The Motley Fool fortnightly. Most recently, Adding Machine 10Key Universal was updated on October 26, 2026 and The Motley Fool on October 27, 2026.

Other comparisons