Comparison

Adding Machine 10Key iPhone vs The Checkbook

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 iPhone

This app emulates a traditional 10-key adding machine, offering reversed operator entry and percentage calculation. Users can edit and save paper tapes, export them to various services, and customize keypad sounds. It's designed for accurate and efficient numerical input.

Highlights
  • True 10-key adding machine emulation
  • Reversed operator entry
  • Percentage calculation
  • Editable paper tape history
  • Save and retrieve paper tape files
  • Export paper tape to iBooks, Dropbox, or printing utilities
Currently charting
Read full description

'Adding Machine 10Key for iPhone’ 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 total (*) key can be on either the left or right side (Sharp or Canon style) and the keypad is expandable to show more or less paper tape history. 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, or your favorite printing utility. . TypeTone - a major innovation to aid accurate key entry using audio feedback (iPad version only). . Full size (1:1) keyboard (iPad version only). . 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. ================ 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. Only the iPad version includes ‘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 Checkbook

Manage your finances on the go with this transaction tracker. Easily record income and expenses, schedule upcoming bills, and reconcile with your bank statements for accurate balance tracking. Offers multiple accounts, customizable themes, and secure access.

Highlights
  • Real-time transaction tracking
  • Upcoming bill and deposit scheduling
  • Bank account reconciliation
  • Multiple account management
  • Customizable color themes
  • Transaction search and filtering
  • Recurring transaction setup
Features
Currently charting
Read full description

Finance At Your Fingertips Track your financial transactions on-the-go in real time. Enter upcoming bill payments and deposits to see how your account balance will change. Reconcile each transaction against your bank account to balance your checkbook and ensure accuracy to the penny. * No ads. * Quick entry screen for new transactions to keep up with spending while you're on the move. * Create a new transaction in seconds with type ahead feature for common transactions. * Manage transactions in multiple accounts. * Customize color theme for each account. * Search for transactions. * Toggle visibility of reconciled transactions to see what hasn't cleared your bank account yet. * Set up recurring transactions. * Transfer money between accounts. * Basic reporting to view spending or income by category and daily spending. * Export transactions to CSV file. * Enable Face ID / Touch ID to secure access to your financial data. * Turn on iCloud Drive data storage to sync transactions across multiple devices. * Share every new transaction with a joint account owner via email or Shared Storage (subscription required) to keep app in sync for different users. Privacy Note: The developer does not collect any data from this app for the default local device or iCloud storage options. The developer only securely stores data for the Shared Storage option (subscription required) for the purpose of sharing and syncing the data with your invited users. See Privacy Policy for more details.

Screenshots

Adding Machine 10Key iPhone4 screens
The Checkbook4 screens

Verdict

The call

The clearest difference is in-app purchases: Adding Machine 10Key iPhone at none against The Checkbook's 2. Adding Machine 10Key iPhone also leads on review sentiment (95% vs 76%) and price ($2.99 vs $4.99). The Checkbook's advantage is rating (4.8 vs 4.6) and update cadence (fortnightly vs every 5 weeks). On ads, monetization model 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

Adding Machine 10Key iPhone costs $2.99 and The Checkbook $4.99 up front. The Checkbook sells 2 in-app purchases, starting at $1.99 per month. Adding Machine 10Key iPhone asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

The Checkbook holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: The Checkbook has 970 ratings behind it against 130, so its average is the more settled of the two. Written reviews complicate that: 95% of Adding Machine 10Key iPhone's written reviews are positive against 76% of The Checkbook's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Adding Machine 10Key iPhone ships an update every 5 weeks, The Checkbook fortnightly. The most recent releases landed on September 26, 2026 and September 24, 2026 respectively.

Scorecard8 real differences · 3 level
Adding Machine 10Key iPhone versus The Checkbook: the parameters behind the verdict, then further details
ParameterAdding Machine 10Key iPhoneThe Checkbook
Price$2.99 — better$4.99
Rating4.6 (130 ratings)4.8 (970 ratings) — better
Positive reviews95.2% of reviews — better75.9% of reviews
Number of ratings130970 — better
Update frequencyEvery 5 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
Best chart rank#56#18 — better
DevicesiPhone, iPod — betteriPhone
Requires iOS12.4 — better16.4
Further details — not scored
Size10 MB61 MB
Age rating4+4+
DeveloperRichard SilvermanFour One Four 213, LLC

Customer experience

Adding Machine 10Key iPhone

All ratings130 ratings
Positive92.3%
Neutral3.1%
Negative4.6%
Written reviews62 reviews
Positive95.2%
Neutral0.0%
Negative4.8%

The Checkbook

All ratings970 ratings
Positive95.3%
Neutral2.0%
Negative2.8%
Written reviews108 reviews
Positive75.9%
Neutral9.3%
Negative14.8%

User reviews

Adding Machine 10Key iPhone

From 130 App Store ratings

What we love

  • 👍 Works like a real adding machine
  • 👍 Tape feature is excellent
  • 👍 Easy to use and user-friendly
  • 👍 Good for complex calculations
  • 👍 Allows editing of numbers

Room to improve

  • 🐛 Watermarks premium exports
  • 🐛 Haphazardly laid out controls
  • 🐛 Touchy sound toggle in free version
  • 🐛 Keypad glitch on re-opening
  • 🐛 Nagging review requests

The Checkbook

From 970 App Store ratings

What we love

  • 💻 Easy to use
  • 🔍 Helps track finances
  • 📱 Convenient mobile app
  • 🧮 Simple check register
  • 🔒 Secure with Face ID

Room to improve

  • 🔢 Limited account name length
  • 🔍 Difficult to view past transactions
  • 🔢 No custom currency options
  • 🐛 Data loss issues
  • 🚫 No iPad-optimized layout

Bugs and requests

Adding Machine 10Key iPhone

Reported bugs

9 issues
  • Watermarks premium PDF exports
  • Haphazardly laid out controls
  • Touchy sound toggle in free version
  • Keypad glitch on re-opening
  • Nagging review requests (Don't ask again button not working)
Show 4 more
  • Incessant review requests (Don't Ask Again option not working)
  • Clearing the tape is a guessing exercise (I button behavior inconsistent)
  • Custom keypad feature removed from iPhone version
  • Inconsistent sound and clear button behavior

Requested features

10 requests
  • Eliminate tape for bigger total screen
  • Add square root feature
  • Bring back custom keypad feature on iPhone version
  • Allow more than 350 lines
  • Allow more notations on tape
Show 5 more
  • Ability to custom label groups
  • Fix period button centering
  • Consider changing app icon
  • Preferences for number format (input and output commas)
  • More control over number formats

The Checkbook

Reported bugs

3 issues
  • Data loss and sync issues
  • Incorrect transaction display
  • Recurring transactions not working as expected

Requested features

6 requests
  • 📊 Spending reports and analytics
  • 🔁 More recurring transaction options
  • 🖨️ Check printing capability
  • 🔀 Ability to split transactions
  • 🔄 Easier transaction editing/deletion
Show 1 more
  • 🔒 Backup and restore options

In-app purchases

None

Adding Machine 10Key iPhone

No in-app purchases

2 purchases

The Checkbook

Subscriptions2
  • Shared Storage - Monthly$1.991 Month
  • Shared Storage - Annual7 Days trial$19.991 Year

Questions

Is Adding Machine 10Key iPhone free?
Adding Machine 10Key iPhone costs $2.99, with no in-app purchases.
Is The Checkbook free?
The Checkbook costs $4.99, and also offers in-app purchases.
Which has better reviews, Adding Machine 10Key iPhone or The Checkbook?
The Checkbook is rated higher. Adding Machine 10Key iPhone averages 4.6 out of 5 from 130 ratings, while The Checkbook averages 4.8 from 970 ratings.
Do Adding Machine 10Key iPhone or The Checkbook have ads?
Neither Adding Machine 10Key iPhone nor The Checkbook shows ads.
Which is updated more often, Adding Machine 10Key iPhone or The Checkbook?
Adding Machine 10Key iPhone ships an update every 5 weeks, and The Checkbook fortnightly. Most recently, Adding Machine 10Key iPhone was updated on September 26, 2026 and The Checkbook on September 24, 2026.
Which is more popular, Adding Machine 10Key iPhone or The Checkbook?
Adding Machine 10Key iPhone currently peaks at #56 in the App Store charts, and The Checkbook at #18. Chart position reflects recent download velocity rather than total install base.

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