# CURB 65 vs NB On Call

The clearest difference is update cadence: NB On Call at every 3 weeks against CURB 65's every 13 months. CURB 65's advantage is iOS requirement (6.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CURB 65 ships an update every 13 months, NB On Call every 3 weeks. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CURB 65 | NB On Call |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 10 MB | 10 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [DOCTOT](https://appshunter.io/developer/351335901) | [GPFORUM SOLUTIONS LIMITED](https://appshunter.io/developer/1207803578) |

## What reviewers say

### CURB 65

[App page](https://appshunter.io/ios/app/curb-65/id720191629)

**Features:** macOS Compatibility

**In-app purchases:** none


### NB On Call

[App page](https://appshunter.io/ios/app/nb-on-call/id1207803579)

A secure, judgment-free community for GMC-registered GPs to share clinical and non-clinical cases. Ask questions, get peer advice, and track your Continuing Professional Development (CPD) automatically. Join thousands of UK GPs in this protected network.

**Highlights:** Share clinical and non-clinical cases, Anonymized posting option, Judgment-free discussion zone, Easy-to-use interface, Protected network with GMC verification, Automatic CPD tracking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CURB 65 free?

CURB 65 is free to download, with no in-app purchases.

### Is NB On Call free?

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

### Do CURB 65 or NB On Call have ads?

Neither CURB 65 nor NB On Call shows ads.

### Which is updated more often, CURB 65 or NB On Call?

CURB 65 ships an update every 13 months, and NB On Call every 3 weeks. Most recently, CURB 65 was updated on October 16, 2026 and NB On Call on October 17, 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.*