# ASHRAE Psychrometric Chart vs Bluebeam

The clearest difference is price: Bluebeam at Free against ASHRAE Psychrometric Chart's $19.99. Bluebeam also leads on update cadence (monthly vs every 11 months). ASHRAE Psychrometric Chart's advantage is review sentiment (27% vs 3%) and iOS requirement (13.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Bluebeam is free to download; ASHRAE Psychrometric Chart costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ASHRAE Psychrometric Chart ships an update every 11 months, Bluebeam monthly. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | ASHRAE Psychrometric Chart | Bluebeam |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | — | **[1.5 (412 ratings)](https://appshunter.io/ios/app/bluebeam/id1479484276/reviews)** |
| Number of ratings | — | **412** |
| Positive reviews | **27.3% of reviews** | 2.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 295 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ASHRAE, Inc.](https://appshunter.io/developer/375374912) | [Bluebeam, Inc.](https://appshunter.io/developer/489696449) |

## What reviewers say

### ASHRAE Psychrometric Chart

[App page](https://appshunter.io/ios/app/ashrae-psychrometric-chart/id584295008)

This interactive tool allows users to plot and customize psychrometric charts on their iPad. Easily create and save HVAC process graphs, update properties dynamically, and share charts and data via email. Supports both IP and SI units.

**Highlights:** Interactive psychrometric chart plotting, Customizable chart appearance, Dynamic property updates, Create and edit points and labels, Email charts and data, Unlimited projects and templates, Zoom and pinch functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Bluebeam

[App page](https://appshunter.io/ios/app/bluebeam/id1479484276)

Access and collaborate on PDF documents directly from your mobile device. Communicate project updates with markups and work offline by syncing files. Seamlessly join live collaboration sessions and manage document revisions from the field.

**Highlights:** Real-time PDF collaboration, Markup and annotation tools, Offline file access, Document syncing, Studio Project management, Live session joining

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

**In-app purchases:** none

**What reviewers like**

- ✅ Automatic saving functionality works well
- 📱 Useful for viewing PDFs on the go
- 🔄 Good for accessing Studio sessions
- 📊 Desktop version is powerful and feature-rich
- 🎯 Cleaner, more modern interface design

**What reviewers complain about**

- ❌ Massive feature loss compared to Revu for iPad
- 🐛 Frequent crashes and freezing issues
- 📉 Severely limited markup tools and capabilities
- 🖊️ Apple Pencil input is unresponsive and laggy
- 💾 Data loss and corruption issues

**Reported bugs**

- Markups fail to load or display correctly
- App deletes markups instead of saving them
- Documents wipe clean when reopened
- Files uploaded disappear from app
- Corrupted file errors when opening PDFs

**Requested features**

- Restore measurement and scaling tools
- Add custom toolsets and tool libraries
- Implement bookmarks for document navigation
- Enable image embedding in callouts
- Add undo/redo functionality


## Frequently asked questions

### Is ASHRAE Psychrometric Chart free?

ASHRAE Psychrometric Chart costs $19.99, with no in-app purchases.

### Is Bluebeam free?

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

### Do ASHRAE Psychrometric Chart or Bluebeam have ads?

Neither ASHRAE Psychrometric Chart nor Bluebeam shows ads.

### Which is updated more often, ASHRAE Psychrometric Chart or Bluebeam?

ASHRAE Psychrometric Chart ships an update every 11 months, and Bluebeam monthly. Most recently, ASHRAE Psychrometric Chart was updated on November 1, 2026 and Bluebeam on November 7, 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.*