# What Doctors Know vs ICD10 Navigator

The clearest difference is in-app purchases: ICD10 Navigator at none against What Doctors Know's 10. What Doctors Know's advantage is update cadence (every 4 months vs every 11 months) and iOS requirement (13.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. What Doctors Know sells 10 in-app purchases, starting at $5.99 per year. ICD10 Navigator asks for nothing beyond the download.

What Doctors Know ships an update every 4 months, ICD10 Navigator every 11 months. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | What Doctors Know | ICD10 Navigator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/icd10-navigator/id6755667327/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | — | Free |
| Size | 12 MB | 18 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [PressPad Sp. z o.o.](https://appshunter.io/developer/449000752) | [Joseph Kim](https://appshunter.io/developer/1855404156) |

## What reviewers say

### What Doctors Know

[App page](https://appshunter.io/ios/app/what-doctors-know/id880982965)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| What Doctors Know | $5.99 | per year |
| Issue #1 | $0.99 | one-time |
| Issue #2 | $0.99 | one-time |
| Issue #3 | $0.99 | one-time |
| Issue #95 | $0.99 | one-time |
| Issue #96 | $0.99 | one-time |
| Issue #97 | $0.99 | one-time |
| Issue #98 | $0.99 | one-time |
| Issue #99 | $0.99 | one-time |
| Issue #100 | $0.99 | one-time |


### ICD10 Navigator

[App page](https://appshunter.io/ios/app/icd10-navigator/id6755667327)

Quickly search and reference ICD-10-CM diagnosis codes with a comprehensive, offline tool. Features include keyword search, billable code filtering, and detailed notes. Ideal for healthcare professionals and students needing accurate code lookup.

**Highlights:** Complete FY2027 ICD-10-CM code set, Keyword search with flexible input, Billable code filtering, Drill down to specific billable codes, Includes, Excludes, and Code First notes, 100% offline functionality, Save and export favorite codes

**In-app purchases:** none


## Frequently asked questions

### Is What Doctors Know free?

What Doctors Know is free to download, with in-app purchases available.

### Is ICD10 Navigator free?

ICD10 Navigator is free to download, with no in-app purchases.

### Do What Doctors Know or ICD10 Navigator have ads?

Neither What Doctors Know nor ICD10 Navigator shows ads.

### Which is updated more often, What Doctors Know or ICD10 Navigator?

What Doctors Know ships an update every 4 months, and ICD10 Navigator every 11 months. Most recently, What Doctors Know was updated on November 6, 2026 and ICD10 Navigator on November 5, 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.*