# ICD 9 vs ICD 10 Coding Guide

ICD 9 and ICD 10 Coding Guide both sit at 4.3 stars, but that hides the real split: 93% of ICD 9's written reviews are positive against 17% of ICD 10 Coding Guide's. ICD 9 also leads on in-app purchases (none vs 1) and update cadence (every 5 weeks vs every 11 months). ICD 10 Coding Guide's advantage is ratings volume (167 vs 22). On price, rating, ads and device support there is nothing between them.

Both are free to download. ICD 10 Coding Guide sells 1 in-app purchase, starting at $9.99 per year. ICD 9 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.3 for ICD 9 against 4.4 for ICD 10 Coding Guide. That said, the two scores are not equally well evidenced: ICD 10 Coding Guide has 167 ratings behind it against 22, so its average is the more settled of the two. Written reviews are what separate them: 93% of ICD 9's written reviews are positive against 17% of ICD 10 Coding Guide's.

ICD 9 ships an update every 5 weeks, ICD 10 Coding Guide every 11 months. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ICD 9 | ICD 10 Coding Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (22 ratings)](https://appshunter.io/ios/app/icd-9-10/id821550817/reviews) | **[4.4 (167 ratings)](https://appshunter.io/ios/app/icd-10-coding-guide-unbound/id1055441695/reviews)** |
| Number of ratings | 22 | **167** |
| Positive reviews | **92.6% of reviews** | 16.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 11 months |
| Monetization | **Free** | Subscription |
| Size | 10 MB | 12 MB |
| Requires iOS | **12.3** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [CareCloud Corp.](https://appshunter.io/developer/431253949) | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) |

## What reviewers say

### ICD 9

[App page](https://appshunter.io/ios/app/icd-9-10/id821550817)

This app facilitates the transition to ICD-10 coding for medical professionals. It offers quick conversion between ICD-9 and ICD-10 diagnostic codes, with detailed descriptions and alternative codes. Users can also search for codes and save frequently used ones for fast access.

**Highlights:** ICD-9 to ICD-10 conversion, Detailed ICD-10 code descriptions, View ICD-10 alternatives, Search ICD-10 and view ICD-9, Access specialty common codes

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Very easy to use
- 🚀 Quick and to the point
- 👍 User-friendly for coders and medical professionals
- 💡 Excellent crosswalk tool (ICD-9 to ICD-10)
- 💰 Free and valuable

**What reviewers complain about**

- 👎 Few specialties listed (e.g., nephrology missing)
- 👎 Search can be wonky at times
- 👎 Missing some specifics
- 👎 Wish it showed more codes around the searched code
- 👎 Decimal point is sometimes optional in EHR, causing minor issues

**Reported bugs**

- First search yields no code available
- Search can be wonky at times
- Difficult to search and convert
- Can't find simple codes

**Requested features**

- Add more specialties (e.g., nephrology)
- Show more codes around the searched code for inexact matches
- Allow reorganization of favorite list by ICD 9 numerical order, ICD 10 ABC order, and customized order
- Make decimal optional for input


### ICD 10 Coding Guide

[App page](https://appshunter.io/ios/app/icd-10-coding-guide-unbound/id1055441695)

Quickly find the latest ICD-10 medical codes with this offline mobile app. Search by code, disease, injury, drug, or keyword. Features include color-coded trees, notes, highlights, and favorites for efficient code assignment.

**Highlights:** Offline ICD-10-CM code access, Rapid search by code, disease, or keyword, Color-keyed Code Trees, Notes and highlights, Favorites for quick access, Companion website

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ICD-10-CM Coding Guide | $9.99 | per year |


## Frequently asked questions

### Is ICD 9 free?

ICD 9 is free to download, with no in-app purchases.

### Is ICD 10 Coding Guide free?

ICD 10 Coding Guide is free to download, with in-app purchases available.

### Which has better reviews, ICD 9 or ICD 10 Coding Guide?

ICD 10 Coding Guide is rated higher. ICD 9 averages 4.3 out of 5 from 22 ratings, while ICD 10 Coding Guide averages 4.4 from 167 ratings.

### Do ICD 9 or ICD 10 Coding Guide have ads?

Neither ICD 9 nor ICD 10 Coding Guide shows ads.

### Which is updated more often, ICD 9 or ICD 10 Coding Guide?

ICD 9 ships an update every 5 weeks, and ICD 10 Coding Guide every 11 months. Most recently, ICD 9 was updated on October 1, 2026 and ICD 10 Coding Guide on October 9, 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.*