# nAble OnCall vs Surgery On Call (LANGE)

The clearest difference is in-app purchases: nAble OnCall at none against Surgery On Call (LANGE)'s 5. nAble OnCall also leads on ads (none vs shown) and iOS requirement (9.0 vs 13.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Surgery On Call (LANGE) sells 5 in-app purchases, starting at $31.99 per year. nAble OnCall asks for nothing beyond the download.

nAble OnCall ships an update every 14 months, Surgery On Call (LANGE) every 7 months. The most recent releases landed on September 9, 2026 and July 27, 2026 respectively.

## The numbers

| Metric | nAble OnCall | Surgery On Call (LANGE) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/surgery-on-call-lange/id1238602004/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Every 7 months** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 46 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [Nth Technologies](https://appshunter.io/developer/840077009) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### nAble OnCall

[App page](https://appshunter.io/ios/app/nable-oncall/id985331983)

**In-app purchases:** none


### Surgery On Call (LANGE)

[App page](https://appshunter.io/ios/app/surgery-on-call-lange/id1238602004)

This app provides quick, on-the-spot treatment advice for over 75 common surgical on-call problems. It offers comprehensive overviews, differential diagnoses, and treatment plans, with a quick reference for commonly used drugs. Content is accessible offline after initial download.

**Highlights:** On-call surgical problem guidance, Differential diagnosis, Treatment plans, Drug reference, Offline access, SmartSearch technology

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 20% Off - Limited Period Offer | $31.99 | per year |
| 15% Off -Limited Period Offer | $33.99 | per year |
| #1 On-call Surgical Problems | $34.99 | per year |
| Surgery On Call 1/Y Sub | $39.99 | per year |
| Surgery On Call | $39.99 | one-time |


## Frequently asked questions

### Is nAble OnCall free?

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

### Is Surgery On Call (LANGE) free?

Surgery On Call (LANGE) is free to download, with in-app purchases available.

### Do nAble OnCall or Surgery On Call (LANGE) have ads?

Surgery On Call (LANGE) shows ads; nAble OnCall does not.

### Which is updated more often, nAble OnCall or Surgery On Call (LANGE)?

nAble OnCall ships an update every 14 months, and Surgery On Call (LANGE) every 7 months. Most recently, nAble OnCall was updated on September 9, 2026 and Surgery On Call (LANGE) on July 27, 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.*