# RxDateCalc vs AstroPup Sky

The clearest difference is update cadence: AstroPup Sky at weekly against RxDateCalc's every 3 months. RxDateCalc's advantage is iOS requirement (15.1 vs 26.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for RxDateCalc against 5.0 for AstroPup Sky. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

RxDateCalc ships an update every 3 months, AstroPup Sky weekly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RxDateCalc | AstroPup Sky |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/rxdatecalc/id6738332338/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/astropup-sky/id6764730162/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | Free |
| Size | 35 MB | 25 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Iconic Apps LLC](https://appshunter.io/developer/1664324698) | [Aaron Freimark](https://appshunter.io/developer/1533614349) |

## What reviewers say

### RxDateCalc

[App page](https://appshunter.io/ios/app/rxdatecalc/id6738332338)

This app helps users accurately calculate medication expiration dates and times. It features an intuitive interface for managing days and hours, customizable color coding for clarity, and aims to enhance patient safety and efficiency.

**Highlights:** Intuitive interface for date and time management, Customizable days, weeks, and hours, Personalized color selection for differentiation, Automated expiration date calculation, Enhanced patient safety, Improved efficiency and time savings

**Features:** macOS Compatibility

**In-app purchases:** none


### AstroPup Sky

[App page](https://appshunter.io/ios/app/astropup-sky/id6764730162)

This application provides a unique sky chart for astrophotographers, displaying celestial object visibility for an entire night. It allows users to personalize their view with custom horizons and receive clear-sky notifications for preferred observing locations.

**Highlights:** All-sky, all-night object visibility, Object rise and set times, Personalized horizon views, Clear-sky notifications, Supports custom horizon files

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

**In-app purchases:** none


## Frequently asked questions

### Is RxDateCalc free?

RxDateCalc is free to download, with no in-app purchases.

### Is AstroPup Sky free?

AstroPup Sky is free to download, with no in-app purchases.

### Which has better reviews, RxDateCalc or AstroPup Sky?

RxDateCalc and AstroPup Sky are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do RxDateCalc or AstroPup Sky have ads?

Neither RxDateCalc nor AstroPup Sky shows ads.

### Which is updated more often, RxDateCalc or AstroPup Sky?

RxDateCalc ships an update every 3 months, and AstroPup Sky weekly. Most recently, RxDateCalc was updated on October 21, 2026 and AstroPup Sky on October 24, 2026.

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