# iProject Viewer vs iGanttChart

The clearest difference is review sentiment: iGanttChart at 60% against iProject Viewer's 26%. iGanttChart also leads on update cadence (every 2 weeks vs every 3 months) and rating (4.0 vs 3.7). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. iProject Viewer sells 2 in-app purchases, starting at $19.99 per year and iGanttChart sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

iGanttChart holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 17 and 23 respectively. Written reviews point the same way: 26% of iProject Viewer's written reviews are positive against 60% of iGanttChart's.

iProject Viewer ships an update every 3 months, iGanttChart every 2 weeks. The most recent releases landed on August 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | iProject Viewer | iGanttChart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (17 ratings)](https://appshunter.io/ios/app/iproject-viewer/id463199295/reviews) | **[4.0 (23 ratings)](https://appshunter.io/ios/app/iganttchart-gantt-chart-app/id1665357828/reviews)** |
| Number of ratings | 17 | **23** |
| Positive reviews | 26.0% of reviews | **60.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 95 MB | 51 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Housatonic.com](https://appshunter.io/developer/463199298) | [YUKI TANAIKE](https://appshunter.io/developer/478558546) |

## 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 |


### iGanttChart

[App page](https://appshunter.io/ios/app/iganttchart-gantt-chart-app/id1665357828)

Create and manage project timelines with ease using this intuitive mobile application. Visualize tasks, track progress, and assign responsibilities with customizable options. Seamlessly sync across devices and share your project plans.

**Highlights:** Intuitive usability, Task progress tracking, Customizable task colors, Link insertion for references, Task priority management, Assignees for task responsibility, Multi-device sync via Google Drive, Export and share Gantt charts

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iGanttChart Pro Version Monthly | $2.99 | per month |
| iGanttChart Pro Version Annual | $27.00 | per year |


## Frequently asked questions

### Is iProject Viewer free?

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

### Is iGanttChart free?

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

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

iGanttChart is rated higher. iProject Viewer averages 3.7 out of 5 from 17 ratings, while iGanttChart averages 4.0 from 23 ratings.

### Do iProject Viewer or iGanttChart have ads?

Neither iProject Viewer nor iGanttChart shows ads.

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

iProject Viewer ships an update every 3 months, and iGanttChart every 2 weeks. Most recently, iProject Viewer was updated on August 24, 2026 and iGanttChart on September 22, 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.*