Comparison

Adding Machine 10Key Universal vs Billing Hours

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

Billing Hours

Effortlessly track your time and expenses for clients and projects. Generate professional invoices, reports, and manage billing periods with ease. Secure your sensitive financial data with a PIN lock.

Highlights
  • Add and manage timed entries and expenses
  • Create custom invoices
  • Email or print invoices and reports
  • Filter entries by date, state, and type
  • PIN lock for data security
  • Unlimited clients, projects, and invoices
Features
Currently charting
Read full description

Take the work out of time tracking and billing with this top application designed specifically for independent contractors. Main Features • Quickly add and manage timed entries and expense items by client and project. • Create a professional custom invoice based on your entries and quickly email or print it. • View entries filtered by date range, state, and type and then print or email PDF and CSV reports with the information. • Date ranges can be week, month, or custom pay periods for each client. • Quickly reload entries from your CSV emails. • Use a PIN lock to hide your billing information from prying eyes. • Unlimited clients, projects, invoices, and reports. • 3D Touch App Menu • Invoices in Spotlight Search ___ Do you have any ideas of what you would like to see or need some help, please drop us an email from within the app. And if you like what we are doing, we'd appreciate a good AppStore review.

Screenshots

Adding Machine 10Key Universal4 screens
Billing Hours4 screens

Verdict

The call

The clearest difference is rating: Adding Machine 10Key Universal at 4.7 against Billing Hours's 3.7. Adding Machine 10Key Universal also leads on review sentiment (94% vs 67%) and ratings volume (136 vs 26). Billing Hours's advantage is iOS requirement (9.0 vs 12.4). On update cadence, ads, in-app purchases and chart position 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 Universal costs $3.99 and Billing Hours $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Adding Machine 10Key Universal holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Adding Machine 10Key Universal has 136 ratings behind it against 26, so its average is the more settled of the two. Written reviews point the same way: 94% of Adding Machine 10Key Universal's written reviews are positive against 67% of Billing Hours's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

Scorecard6 real differences · 5 level
Adding Machine 10Key Universal versus Billing Hours: the parameters behind the verdict, then further details
ParameterAdding Machine 10Key UniversalBilling Hours
Price$3.99 — better$4.99
Rating4.7 (136 ratings) — better3.7 (26 ratings)
Positive reviews94.0% of reviews — better67.4% of reviews
Number of ratings136 — better26
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#158 — better#200
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.49.0 — better
Further details — not scored
Size23 MB3 MB
Age rating4+4+
DeveloperRichard SilvermanBirdsoft LLC

Customer experience

Adding Machine 10Key Universal

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

Billing Hours

All ratings26 ratings
Positive61.5%
Neutral15.4%
Negative23.1%
Written reviews89 reviews
Positive67.4%
Neutral13.5%
Negative19.1%

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

Billing Hours

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Adding Machine 10Key Universal

No in-app purchases

None

Billing Hours

No in-app purchases

Questions

Is Adding Machine 10Key Universal free?
Adding Machine 10Key Universal costs $3.99, with no in-app purchases.
Is Billing Hours free?
Billing Hours costs $4.99, with no in-app purchases.
Which has better reviews, Adding Machine 10Key Universal or Billing Hours?
Adding Machine 10Key Universal is rated higher. Adding Machine 10Key Universal averages 4.7 out of 5 from 136 ratings, while Billing Hours averages 3.7 from 26 ratings.
Do Adding Machine 10Key Universal or Billing Hours have ads?
Neither Adding Machine 10Key Universal nor Billing Hours shows ads.
Which is updated more often, Adding Machine 10Key Universal or Billing Hours?
Adding Machine 10Key Universal ships an update every 2 months, and Billing Hours every 2 months. Most recently, Adding Machine 10Key Universal was updated on October 14, 2026 and Billing Hours on October 10, 2026.
Which is more popular, Adding Machine 10Key Universal or Billing Hours?
Adding Machine 10Key Universal currently peaks at #158 in the App Store charts, and Billing Hours at #200. Chart position reflects recent download velocity rather than total install base.

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