# On Call Central vs NBDF Events

The clearest difference is rating: On Call Central at 4.0 against NBDF Events's 2.9. On Call Central also leads on update cadence (every 3 weeks vs every 10 months) and review sentiment (67% vs 50%). NBDF Events's advantage is iOS requirement (11.0 vs 17.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

On Call Central holds the better App Store score, 4.0 against 2.9. Both are backed by a comparable volume of ratings — 11 and 10 respectively. Written reviews point the same way: 67% of On Call Central's written reviews are positive against 50% of NBDF Events's.

On Call Central ships an update every 3 weeks, NBDF Events every 10 months. The most recent releases landed on October 29, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | On Call Central | NBDF Events |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (11 ratings)](https://appshunter.io/ios/app/on-call-central/id1168997000/reviews)** | [2.9 (10 ratings)](https://appshunter.io/ios/app/nbdf-events/id1438082244/reviews) |
| Number of ratings | **11** | 10 |
| Positive reviews | **66.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 10 months |
| Monetization | Free | Free |
| Size | 63 MB | 50 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Acumantra Solutions, Inc.](https://appshunter.io/developer/311986147) | [National Bleeding Disorders Foundation](https://appshunter.io/developer/1381410669) |

## What reviewers say

### On Call Central

[App page](https://appshunter.io/ios/app/on-call-central/id1168997000)

Access and manage your medical on-call messages and schedules directly from your mobile device. Respond to messages, initiate calls to patients and colleagues, and update your contact preferences seamlessly.

**Highlights:** Listen to on-call messages, Respond to messages, Place direct calls, View call schedule, Update contact preferences

**Features:** Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases:** none


### NBDF Events

[App page](https://appshunter.io/ios/app/nbdf-events/id1438082244)

Access information about events hosted by the National Bleeding Disorders Foundation. Stay updated on upcoming conferences, meetings, and community gatherings.

**Highlights:** Event listings, Conference updates, Meeting information, Community gatherings, Foundation news

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is On Call Central free?

On Call Central is free to download, with no in-app purchases.

### Is NBDF Events free?

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

### Which has better reviews, On Call Central or NBDF Events?

On Call Central is rated higher. On Call Central averages 4.0 out of 5 from 11 ratings, while NBDF Events averages 2.9 from 10 ratings.

### Do On Call Central or NBDF Events have ads?

Neither On Call Central nor NBDF Events shows ads.

### Which is updated more often, On Call Central or NBDF Events?

On Call Central ships an update every 3 weeks, and NBDF Events every 10 months. Most recently, On Call Central was updated on October 29, 2026 and NBDF Events on September 16, 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.*