# Date T Calc vs 100 Days After

The clearest difference is price: 100 Days After at Free against Date T Calc's $0.99. 100 Days After also leads on update cadence (every 4 months vs every 17 months) and ratings volume (6 vs 1). Date T Calc's advantage is review sentiment (100% vs 62%). On rating, ads, in-app purchases and device support there is nothing between them.

100 Days After is free to download; Date T Calc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

100 Days After holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: 100 Days After has 6 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 62% of 100 Days After'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, 100 Days After every 4 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | Date T Calc | 100 Days After |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/date-t-calc/id426018218/reviews) | **[4.2 (6 ratings)](https://appshunter.io/ios/app/100-days-after/id444664249/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | **100.0% of reviews** | 62.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 4 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 9 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Roberto Panetta](https://appshunter.io/developer/1438480110) | [Broong, Inc.](https://appshunter.io/developer/324853708) |

## What reviewers say

### Date T Calc

[App page](https://appshunter.io/ios/app/date-t-calc/id426018218)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 100 Days After

[App page](https://appshunter.io/ios/app/100-days-after/id444664249)

Calculate the 100th day from any given date or celebrate anniversaries. Export calculated dates as events to your iPhone's calendar.

**Highlights:** Calculate 100th day from any date, Celebrate anniversaries, Export dates as calendar events, New user interface, New features

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Date T Calc free?

Date T Calc costs $0.99, with no in-app purchases.

### Is 100 Days After free?

100 Days After is free to download, with no in-app purchases.

### Which has better reviews, Date T Calc or 100 Days After?

100 Days After is rated higher. Date T Calc averages 4.0 out of 5 from 1 ratings, while 100 Days After averages 4.2 from 6 ratings.

### Do Date T Calc or 100 Days After have ads?

Neither Date T Calc nor 100 Days After shows ads.

### Which is updated more often, Date T Calc or 100 Days After?

Date T Calc ships an update every 17 months, and 100 Days After every 4 months. Most recently, Date T Calc was updated on November 1, 2026 and 100 Days After on November 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*