# iProject Viewer vs GanttPRO

The clearest difference is rating: GanttPRO at 5.0 against iProject Viewer's 3.7. GanttPRO also leads on in-app purchases (none vs 2). iProject Viewer's advantage is ratings volume (17 vs 3) and device support (3 vs 1). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. iProject Viewer sells 2 in-app purchases, starting at $19.99 per year. GanttPRO asks for nothing beyond the download.

GanttPRO holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: iProject Viewer has 17 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 26% of iProject Viewer's written reviews are positive against 33% of GanttPRO's.

iProject Viewer ships an update every 3 months, GanttPRO every 2 months. The most recent releases landed on August 24, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | iProject Viewer | GanttPRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (17 ratings)](https://appshunter.io/ios/app/iproject-viewer/id463199295/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ganttpro/id1579665713/reviews)** |
| Number of ratings | **17** | 3 |
| Positive reviews | 26.0% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 95 MB | 21 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Housatonic.com](https://appshunter.io/developer/463199298) | [DPM SOLUTIONS SP Z O O](https://appshunter.io/developer/1708891154) |

## What reviewers say

### iProject Viewer

[App page](https://appshunter.io/ios/app/iproject-viewer/id463199295)

View, edit, and create Microsoft Project plans on your iOS device. Access files from cloud storage and email, with advanced editing and viewing options available through in-app purchases.

**Highlights:** Open MS Project files from cloud storage, Create new Gantt charts, Edit and save existing MS Project plans, View Gantt, Task, and Resource Sheets, Advanced sorting and filtering, Network Diagram view, Print project info to PDF

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced View-Only | $19.99 | per year |
| Standard Editor | $129.99 | per year |


### GanttPRO

[App page](https://appshunter.io/ios/app/ganttpro/id1579665713)

Manage projects and collaborate with your team on the go. This tool allows for task creation, time tracking, and real-time notifications to keep everyone informed and organized. It's an extension of the web-based platform for convenient mobile access.

**Highlights:** Gantt chart creation, Task management, Team collaboration, Time tracking, Push notifications, Resource assignment

**In-app purchases:** none


## Frequently asked questions

### Is iProject Viewer free?

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

### Is GanttPRO free?

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

### Which has better reviews, iProject Viewer or GanttPRO?

GanttPRO is rated higher. iProject Viewer averages 3.7 out of 5 from 17 ratings, while GanttPRO averages 5.0 from 3 ratings.

### Do iProject Viewer or GanttPRO have ads?

Neither iProject Viewer nor GanttPRO shows ads.

### Which is updated more often, iProject Viewer or GanttPRO?

iProject Viewer ships an update every 3 months, and GanttPRO every 2 months. Most recently, iProject Viewer was updated on August 24, 2026 and GanttPRO on June 1, 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.*