Date Calculator vs Hydraulic System Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Date Calculator
Easily calculate the difference between dates, add or subtract days, and create custom countdowns. Personalize your workweek and skip specific dates for accurate workday calculations. Track events with home screen widgets and receive timely notifications.
- Add/subtract days, weeks, months, years
- Customizable workweek calculations
- Skip specific dates
- Calculate intervals between dates
- Create customizable countdowns
- Home screen widgets
- Countdown notifications
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Calculate dates, intervals between two dates and create countdowns — all in one app, Timerange. Add or subtract workdays or set up your workweek and get exact amount of workdays between two dates. Create customizable countdowns and display them on your Home Screen with widgets. Features: • Add days, weeks, months or years to any date or subtract them. • Choose which weekdays to count. • Set specific dates that must be skipped in the calculation. • Calculate intervals between two dates. • Exclude or include start and end dates into calculation. • Get exact amount of workdays, non-working days or weekdays selected by you between dates. • Set your own workweek to personalize results when calculating intervals. • Create time counters from a specific event or countdowns until an event. • Set style of the counters and their color. • Receive notifications when a countdown is about to finish. • Add Time Counters widget to your Home Screen to track the counters without opening Timerange. • Customize every screen’s initial data that will be shown to you every time you launch the app. Subscription terms: - The subscription auto-renews at the end of each term. - Payment will be charged to iTunes Account at confirmation of purchase. - The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period. - You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase. Privacy policy and Terms of Use: https://applorium.com/privacy-date-calculator/
Hydraulic System Calculator
Calculate key parameters for hydraulic cylinders, pumps, motors, and pipes. Design individual components, view formulas, and switch between metric and imperial units for precise engineering.
- Calculate cylinder, pump, and motor parameters
- Design single/double-acting cylinders
- View and switch units (Metric/Imperial)
- Calculate piping parameters
- Dynamic result updates
- Copy and share results
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The Hydraulic System Calculator is an intuitive tool for people working with hydraulic cylinders, pumps, motors and pipes. This app enables design of individual hydraulic components around single-acting or double-acting cylinders. A user can look into the formulas involved and switch to their preferred units. Features at a glance: - By entering the requisite dimensions of the cylinder and parameters like the pressure and oil flow the user would be able to calculate the areas & volumes in the cylinder, extraction & retraction forces, velocity, time, outflow and ratio. The output is derived on both the piston and rod side of the cylinder - A backward compatibility is also provided on some of the parameters (force, time & velocity) in the cylinder area to provide users with the extension of using the calculator in more user friendly environment - The app enables the calculation of flow rate, pressure, displacement, speed, torque and power in Motor section - The app enables the calculation of displacement, flow rate, electric motor power and total efficiency in Pump section - The app can be used to calculate pressure drop around an orifice - Piping parameters like velocity, cross-sectional area and reynolds number can be calculated using absolute or kinematic viscosity - The calculations can be carried out in both Metric or Imperial units - The data provided is in conformation with ISO 3320, ISO 3321 and ISO 4393 in the cylinder section - The calculator is built to dynamically update the results as the user keys in the values - The input and output values could be displayed in preferred sub-units as per the requirements of the user after the calculation is carried out. It also helps the user to make specific changes in units before the calculations - Interactive images on cylinder section provides the user with a good understanding of the component - The results can be copied to clipboard and can be shared via e-mail
Screenshots
Verdict
The clearest difference is review sentiment: Date Calculator at 63% against Hydraulic System Calculator's 0%. Date Calculator also leads on rating (4.5 vs 4.0) and update cadence (every 6 weeks vs every 7 months). Hydraulic System Calculator's advantage is in-app purchases (none vs 4) and iOS requirement (14.0 vs 18.0). On price, 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
Both are free to download. Date Calculator sells 4 in-app purchases, starting at $3.99 per month. Hydraulic System Calculator asks for nothing beyond the download.
Date Calculator holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Date Calculator has 200 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 63% of Date Calculator's written reviews are positive against 0% of Hydraulic System Calculator's.
Date Calculator ships an update every 6 weeks, Hydraulic System Calculator every 7 months. The most recent releases landed on October 23, 2026 and September 30, 2026 respectively.
| Parameter | Date Calculator | Hydraulic System Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (200 ratings) — better | 4.0 (3 ratings) |
| Positive reviews | 63.1% of reviews — better | 0.0% of reviews |
| Number of ratings | 200 — better | 3 |
| Update frequency | Every 6 weeks — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | Applorium Ltd | Trelleborg Sealing Solutions |
Customer experience
Date Calculator
Hydraulic System Calculator
Bugs and requests
Date Calculator
Reported bugs
10 issues- Premium interval exclusion feature not working despite payment
- Widget displays incorrect values (e.g., '0 days old')
- App crashes when swiping to secondary function
- Date selection doesn't persist when clicking away
- Calculations intermittently off by one day
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- Items jump when editing on iOS 16.1.1
- Cannot change start date in newer versions
- App crashes after making changes
- Widget won't load
- Secondary function for calculating days between dates causes crashes
Requested features
11 requests- Ability to exclude/include specific holidays and dates
- Support for calculating days between two dates (not just from a date)
- Business days only calculation (exclude weekends)
- Multiple interval tracking simultaneously
- Save custom holiday periods
Show 6 moreShow fewer
- Input dates numerically instead of scroll wheel
- Subtract days from dates functionality
- Week-based calculations
- Horizontal orientation support
- Color customization options
- Standard calendar integration for holidays
Hydraulic System Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Date Calculator
- Timerange Plus Monthly$3.991 Month
- Timerange Plus Annual3 Days trial$9.991 Year
- Timerange Plus$6.99
- Date Calculator Plus$19.99
Hydraulic System Calculator
No in-app purchases
Questions
Is Date Calculator free?
Is Hydraulic System Calculator free?
Which has better reviews, Date Calculator or Hydraulic System Calculator?
Do Date Calculator or Hydraulic System Calculator have ads?
Which is updated more often, Date Calculator or Hydraulic System Calculator?
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