# RezClock vs Internal Medicine On Call

The clearest difference is rating: Internal Medicine On Call at 4.2 against RezClock's 2.3. Internal Medicine On Call also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 8 months vs every 35 months). RezClock's advantage is ads (none vs shown) and iOS requirement (10.0 vs 13.0). On price, ratings volume and in-app purchases there is nothing between them.

Both are free to download. RezClock sells 1 in-app purchase, starting at $0.99 per month and Internal Medicine On Call sells 6 in-app purchases, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.

Internal Medicine On Call holds the better App Store score, 4.2 against 2.3. Both are backed by a comparable volume of ratings — 3 and 5 respectively.

RezClock ships an update every 35 months, Internal Medicine On Call every 8 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | RezClock | Internal Medicine On Call |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/rezclock/id988755622/reviews) | **[4.2 (5 ratings)](https://appshunter.io/ios/app/internal-medicine-on-call/id1237575507/reviews)** |
| Number of ratings | 3 | **5** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 35 months | **Every 8 months** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 24 MB | 46 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [Mitra U.S. Computer Solutions, Inc](https://appshunter.io/developer/988434177) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### RezClock

[App page](https://appshunter.io/ios/app/rezclock/id988755622)

Automates medical resident duty hour tracking using location services to log arrival and departure times at clinical sites. Hours can be uploaded to other systems for generating ACGME required reports. Offers a free trial period before subscription.

**Highlights:** Automated time tracking, Location-based geofencing, Duty hours reporting, Data upload to MedProSuite, Free trial period

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RezClock Monthly - $0.99/month | $0.99 | per month |


### Internal Medicine On Call

[App page](https://appshunter.io/ios/app/internal-medicine-on-call/id1237575507)

This medical reference app provides concise guidance on over 60 common internal medicine on-call problems. It includes interactive flowcharts for decision support and essential information on laboratory tests and procedures. An in-app purchase unlocks all content.

**Highlights:** Covers over 60 common on-call problems, Interactive flowcharts for decision support, Interpretation of laboratory tests and procedures, Concise evaluation and treatment plans, Quick reference for on-call therapeutics, Offline access to content

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25% Off-Limited Period Offer | $29.99 | per year |
| 20% Off-Limited Period Offer | $31.99 | per year |
| 15% Off-Limited Time Offer | $33.99 | per year |
| #1 On-call Guide IM Problems | $34.99 | per year |
| Internal Med On Call 1/Y Sub | $39.99 | per year |
| Internal Medicine On Call | $39.99 | one-time |


## Frequently asked questions

### Is RezClock free?

RezClock is free to download, with in-app purchases available.

### Is Internal Medicine On Call free?

Internal Medicine On Call is free to download, with in-app purchases available.

### Which has better reviews, RezClock or Internal Medicine On Call?

Internal Medicine On Call is rated higher. RezClock averages 2.3 out of 5 from 3 ratings, while Internal Medicine On Call averages 4.2 from 5 ratings.

### Do RezClock or Internal Medicine On Call have ads?

Internal Medicine On Call shows ads; RezClock does not.

### Which is updated more often, RezClock or Internal Medicine On Call?

RezClock ships an update every 35 months, and Internal Medicine On Call every 8 months. Most recently, RezClock was updated on November 1, 2026 and Internal Medicine On Call on November 2, 2026.

---

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