Date T Calc vs iA Presenter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Date T Calc
Easily calculate future and past dates by adding or subtracting days, hours, and minutes. Determine the exact difference between two selected dates, with options for date-only or date-and-time calculations.
- Calculate future and past dates
- Determine date differences
- Operate in date-only or date-time modes
- Add/subtract date intervals
- Consider Daylight Saving Time
- Supports 12/24 hour format
- Internal help guide
Read full descriptionHide full description
Date T Calc can calculate future and past dates adding days, hours and minutes to a specified date. It can also calculate date difference between two dates you select. EASY TO USE • Add a date/time interval to a specific date guessing the future/past date • Calculate the difference from 2 dates • Operate in date only mode (calculating only days) or also considering hours and minutes • Add from a selected date a specified amount of days in a click • Switch at any time from guess date to date difference in a click • Can add or subtract date going in the future or in the past FEATURES • Operate in Date Guess mode guessing a date after adding days/hours/minutes • Operates in Date Difference mode selecting 2 date and indicating the difference • Operates in Date Mode (only days) or Date Time Mode, working with days, hours and minutes • Can switch at any time from Date Only Mode to Date Time Mode • Can add or subtract date intervals • Can guess future and paste date • Has a preset amount off days, hours ,minutes to add in a touch • Now button to set the current date in a click • Calculation consider also Daylight Saving Time when necessary • Date and time is displayed in your local country setting using 12 or 24 hour format • Internal Help User Guide ALL THE POWER OF iOS • Works both for any iPhone and any iPAD • Optimized for the latest generation iOS devices
iA Presenter
Create clean, scalable presentations quickly using Markdown. This app prioritizes content and structure, letting responsive templates handle design for fast, focused creation and rehearsal on Mac, iPhone, and iPad.
- Markdown-based content creation
- Responsive typographic templates
- Fast deck building and rehearsal
- Cross-device compatibility (Mac, iPhone, iPad)
- Scalable layouts for any screen
Read full descriptionHide full description
Create presentations in minutes iA Presenter is a Markdown-based presentation app for Mac, iPhone, and iPad. Start with text and build a deck that is clean, scalable, and ready to present, fast and focused. Traditional presentation tools slow you down. You drag boxes, pick fonts, adjust colors, and end up with cluttered slides. iA Presenter flips the workflow: start with your story, structure it in Markdown, and let our responsive, typographic templates handle the design. Perfect for pitches, meetings, workshops, and teaching. Build, rehearse, and present a polished deck in under 20 minutes on your Mac at the desk, iPad on the go, or iPhone in your hand. - Write first, design later: Start from text, not slides - Beautiful everywhere: Responsive layouts scale seamlessly from iPhone to iPad to Mac to projector - Fast and focused: Build, rehearse, and present a polished deck in under 20 minutes - Portable presentations: Create and present wherever you need to work, on desktop, tablet, or phone
Screenshots
Verdict
The clearest difference is price: Date T Calc at $0.99 against iA Presenter's $19.99. Date T Calc also leads on review sentiment (100% vs 88%) and iOS requirement (12.0 vs 16.0). iA Presenter's advantage is rating (4.9 vs 4.0) and update cadence (every 2 weeks vs every 17 months). On ads, in-app purchases, 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
Date T Calc costs $0.99 and iA Presenter $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iA Presenter holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: iA Presenter has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of Date T Calc's written reviews are positive against 88% of iA Presenter's, so the app with the better star average is not the one people write more warmly about.
Date T Calc ships an update every 17 months, iA Presenter every 2 weeks. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.
| Parameter | Date T Calc | iA Presenter |
|---|---|---|
| Price | $0.99 — better | $19.99 |
| Rating | 4.0 (1 ratings) | 4.9 (10 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 87.5% of reviews |
| Number of ratings | 1 | 10 — better |
| Update frequency | Every 17 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #94 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 93 MB |
| Age rating | 4+ | 4+ |
| Developer | Roberto Panetta | Information Architects AG |
Customer experience
Date T Calc
iA Presenter
In-app purchases
Date T Calc
No in-app purchases
iA Presenter
No in-app purchases
Questions
Is Date T Calc free?
Is iA Presenter free?
Which has better reviews, Date T Calc or iA Presenter?
Do Date T Calc or iA Presenter have ads?
Which is updated more often, Date T Calc or iA Presenter?
Other comparisons
