# CredBook vs PulmTools

The clearest difference is in-app purchases: PulmTools at none against CredBook's 2. PulmTools also leads on ratings volume (8 vs 1). CredBook's advantage is update cadence (every 2 days vs every 5 days) and iOS requirement (15.1 vs 18.5). On price, rating, ads and device support there is nothing between them.

Both are free to download. CredBook sells 2 in-app purchases, starting at $3.00 per month. PulmTools asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for CredBook against 5.0 for PulmTools. That said, the two scores are not equally well evidenced: PulmTools has 8 ratings behind it against 1, so its average is the more settled of the two.

CredBook ships an update every 2 days, PulmTools every 5 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CredBook | PulmTools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/credbook/id6760574525/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/pulmtools-abg-and-vbg-analyzer/id6770799843/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | Freemium | **Free** |
| Size | 32 MB | 55 MB |
| Requires iOS | **15.1** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Med Staff Tracker, LLC](https://appshunter.io/developer/1863974330) | [Ledgeworks LLC](https://appshunter.io/developer/1896763783) |

## What reviewers say

### CredBook

[App page](https://appshunter.io/ios/app/credbook/id6760574525)

Manage all your professional healthcare credentials in one secure app. Get smart reminders for renewals, store important documents, and track continuing education. Generate summaries for applications and stay audit-ready.

**Highlights:** Credential tracking, Expiration reminders, Document storage, CME/CE activity log, PDF credential summary, Secure access

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription Plan | $3.00 | per month |
| Annual Pro Subscription | $20.00 | per year |


### PulmTools

[App page](https://appshunter.io/ios/app/pulmtools-abg-and-vbg-analyzer/id6770799843)

This medical app helps clinicians and students interpret blood gas results, utilize clinical calculators, and practice realistic cases. It offers tools for respiratory and critical care, with progress tracking available via a free account.

**Highlights:** Interpret ABGs and VBGs, Clinical calculators and references, Realistic case practice, Progress tracking, Breathing exercises, Trend analysis

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

**In-app purchases:** none


## Frequently asked questions

### Is CredBook free?

CredBook is free to download, with in-app purchases available.

### Is PulmTools free?

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

### Which has better reviews, CredBook or PulmTools?

CredBook and PulmTools are both rated 5.0 out of 5 on the App Store, from 1 and 8 ratings respectively.

### Do CredBook or PulmTools have ads?

Neither CredBook nor PulmTools shows ads.

### Which is updated more often, CredBook or PulmTools?

CredBook ships an update every 2 days, and PulmTools every 5 days. Most recently, CredBook was updated on November 5, 2026 and PulmTools on October 31, 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.*