# PMI Study Hall vs ATD Bookshelf

The clearest difference is update cadence: PMI Study Hall at every 2 months against ATD Bookshelf's every 4 months. 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.

PMI Study Hall ships an update every 2 months, ATD Bookshelf every 4 months. The most recent releases landed on October 21, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | PMI Study Hall | ATD Bookshelf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (16 ratings)](https://appshunter.io/ios/app/pmi-study-hall/id1565857249/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 25.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 183 MB | 185 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [PROJECT MANAGEMENT INSTITUTE, INC](https://appshunter.io/developer/562906501) | [ASTD](https://appshunter.io/developer/349768874) |

## What reviewers say

### PMI Study Hall

[App page](https://appshunter.io/ios/app/pmi-study-hall/id1565857249)

This app serves as a supplementary learning tool to help users stay informed, focused, engaged, and motivated on their journey to obtaining the PMP certification. It is designed to support your preparation for the PMP exam.

**Highlights:** PMP certification preparation, Supplementary learning tool, Focus and motivation, Engagement features

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

**In-app purchases:** none

**What reviewers like**

- 📚 Comprehensive study material and practice questions
- ✅ Helpful for passing PMP exam
- 🎮 Variety of learning formats (games, flashcards, practice exams)
- 📱 Convenient mobile access to study content
- 🎯 Questions similar to actual exam

**What reviewers complain about**

- 🔐 Google SSO login completely broken
- ⚠️ Frequent session expiration requiring constant re-login
- 🐌 Extremely slow app performance and loading times
- 🐛 Multiple glitches and unresponsive interface
- 🌐 Mixed Japanese and English content with no language toggle

**Reported bugs**

- Google Sign-In returns Error 403: disallowed_useragent
- App stuck on loading screen indefinitely
- Session expires frequently, requiring re-login each time app opens
- Courses purchased on website don't appear in app
- Touch input selects wrong answer (selecting B registers as A)

**Requested features**

- Fix Google SSO authentication to comply with Google security policies
- Implement persistent login with biometric authentication (FaceID)
- Add language selection/toggle to remove unwanted content
- Allow selective category/section reset instead of full reset
- Improve app responsiveness and loading speed


### ATD Bookshelf

[App page](https://appshunter.io/ios/app/atd-bookshelf/id6752909753)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PMI Study Hall free?

PMI Study Hall is free to download, with no in-app purchases.

### Is ATD Bookshelf free?

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

### Do PMI Study Hall or ATD Bookshelf have ads?

Neither PMI Study Hall nor ATD Bookshelf shows ads.

### Which is updated more often, PMI Study Hall or ATD Bookshelf?

PMI Study Hall ships an update every 2 months, and ATD Bookshelf every 4 months. Most recently, PMI Study Hall was updated on October 21, 2026 and ATD Bookshelf on October 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.*