Comparison

Between Dates Calendar Math vs ErgoMine

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

Head to head
About

Between Dates Calendar Math

Calculate the number of days between two dates with a simple interface. Save, recall, sort, and remove date calculations. Add or subtract days from selected dates for quick date projections.

Highlights
  • Calculate days between dates
  • Save and recall date calculations
  • Sort and remove saved dates
  • Add or subtract days
  • Copy dates to start/end
  • Reset dates to current
Features
Read full description

Between Days was written to quickly tell how many days are between two dates. It uses a simple interface to get these answers in the quickest way possible. Underneath the simplicity, Between Days is one of the most feature rich date apps in the app store. Don’t let the simple interface fool you, this app does show a lot of information in a clean and easy to use format. To use the app simply set the start date and end date and it will display the number of days between those two dates. To select which date to edit you can either touch the date you want to change, or press the setting start date/ setting end date button. The selector will automatically change to display the date selected. It will also display the current day of the week showing on the calendar selector. If you would like to save the date for later, simply press the save button on the bottom. To recall a date, or to view saved dates press the view dates button on the bottom. Once you are at the list of dates you can sort or remove them. You can also press on a date to use it as the current date, or press done to return to your previous dates. There are also add and subtract buttons. This is useful if you need to find what the date is before or after a certain number of days, month or years. The copy to end date/copy to start date button will set both the start date and end date to the selected date. The reset button will set the beginning and end date to the current date, but will leave your saved dates alone. I hope you enjoy this app and find it useful! If you have any questions or comments send me an e-mail at Don.Espe@gmail.com Please rate this app so I know if there is enough interest to develop new features for it.

About

ErgoMine

This app helps mining companies conduct ergonomics audits for various operations. It uses questionnaires to identify workplace deficiencies and provides recommendations and resources for improvement. Developed by researchers, it's designed for safety personnel without requiring ergonomics expertise.

Highlights
  • Ergonomics audits for bagging, maintenance, and haul trucks
  • Focus on injury prevention
  • Questionnaire-based evaluation
  • Provides recommendations and resources
  • Developed by occupational safety researchers
  • No ergonomics expertise required
Features
Read full description

ErgoMine allows mining companies to perform ergonomics audits for bagging, maintenance and repair, and haul truck operations. These audits primarily focus on injuries due to handling materials, policies, workplace design, and slips, trips, and falls, but address other ergonomics deficiencies. This application presents a series of questionnaires and evaluates the answers to provide the auditor with information, recommendations, and targeted resources to improve the workplace environment. ErgoMine was developed by Pittsburgh Mining Research Division researchers within the National Institute for Occupational Safety and Health. The audits and recommendations are based on information from sources including laboratory studies, field studies, injury and fatality data, consensus standards, regulations, and best practices. The audits were designed to be conducted by mine personnel responsible for safety and does not require any ergonomics expertise.

Screenshots

Between Dates Calendar Math4 screens
ErgoMine4 screens

Verdict

The call

The clearest difference is price: ErgoMine at Free against Between Dates Calendar Math's $0.99. ErgoMine also leads on iOS requirement (9.0 vs 13.0). Between Dates Calendar Math's advantage is rating (4.8 vs 3.0) and update cadence (every 4 months vs every 16 months). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

ErgoMine is free to download; Between Dates Calendar Math costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Between Dates Calendar Math holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Between Dates Calendar Math has 42 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Between Dates Calendar Math ships an update every 4 months, ErgoMine every 16 months. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

Scorecard6 real differences · 4 level
Between Dates Calendar Math versus ErgoMine: the parameters behind the verdict, then further details
ParameterBetween Dates Calendar MathErgoMine
Price$0.99Free — better
Rating4.8 (42 ratings) — better3.0 (2 ratings)
Positive reviews50.0% of reviews—
Number of ratings42 — better2
Update frequencyEvery 4 months — betterEvery 16 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.09.0 — better
Further details — not scored
Size1 MB151 MB
Age rating4++4
DeveloperDucky Planet LLCCenters For Disease Control and Prevention

Customer experience

Between Dates Calendar Math

All ratings42 ratings
Positive95.2%
Neutral0.0%
Negative4.8%
Written reviews8 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

ErgoMine

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Between Dates Calendar Math

No in-app purchases

None

ErgoMine

No in-app purchases

Questions

Is Between Dates Calendar Math free?
Between Dates Calendar Math costs $0.99, with no in-app purchases.
Is ErgoMine free?
ErgoMine is free to download, with no in-app purchases.
Which has better reviews, Between Dates Calendar Math or ErgoMine?
Between Dates Calendar Math is rated higher. Between Dates Calendar Math averages 4.8 out of 5 from 42 ratings, while ErgoMine averages 3.0 from 2 ratings.
Do Between Dates Calendar Math or ErgoMine have ads?
Neither Between Dates Calendar Math nor ErgoMine shows ads.
Which is updated more often, Between Dates Calendar Math or ErgoMine?
Between Dates Calendar Math ships an update every 4 months, and ErgoMine every 16 months. Most recently, Between Dates Calendar Math was updated on October 6, 2026 and ErgoMine on October 7, 2026.

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