iProject Viewer vs iGanttChart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iProject Viewer
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.
- 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
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New!! Create Gantt charts and edit/save existing MS Project Plans in MPP file format! Housatonic’s Project Viewer 365 for iOS allows you to open MS Project Plans from cloud locations like Google Drive. Dropbox, OneDrive, SharePoint Online, Box, Basecamp, URL Links and email attachments. Housatonic Project Viewer 365 for iOS is compatible with Microsoft Project (MPP file format) 2024, 2021, 2019, 2016, 2013, 2010, 2007, 2003 and earlier versions. The interface is intuitive making Project Viewer simple for the end users. Now Microsoft Project Plans look better than ever on your iOS. Free view-only MS Project views like Gantt chart, Task Sheet and Resource Sheet are available along with basic project plan sorting, filters, zooming and time scale viewing capabilities. Additional features can be enabled by subscribing to in-app-purchase packages: In-App Option 1: Advanced View Only Enable advanced sorting capabilities, apply additional filter options, customize time scale Access additional project views like Calendar View, Resource and Task Usage, View Network Diagram View Multiple Project Reports and Print Project Info to PDF or Paper This in-app purchase option is offered on a yearly (1 year) basis for a price of $19.99 USD per year. In-App Option 2: Standard Editor Create new Gantt charts and modify existing project schedules in the same intuitive way as MS Project. Save and Share your plans (MPP files) from any storage or cloud location on any iOS device. Works with, or as an alternative to Microsoft Project. This in-app purchase option is offered on a yearly (1 year) basis for a price of $129.99 USD per year. Payment will be charged to iTunes Account at confirmation of purchase Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase No cancellation of the current subscription is allowed during active subscription period Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms and Conditions: http://housatonic.com/terms.html Privacy Policy: http://housatonic.com/privacy.html
iGanttChart
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.
- 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
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This iGanttChart app makes it easy to create Gantt charts right on your smartphone or tablet. It offers a range of expressive options, including task progress, colors, and links. Use it for project management, task management, and any other scenarios where you need a Gantt chart. [Features] - Intuitive usability Ease of use is the most important key for simple functions. It works quickly and you can edit intuitively. - Rich expression You can assign your preferred color to each task for expressive representation. - Progress management You can track each task's progress with a progress rate. - Link Since you can insert links, it is also useful when you want to manage reference sites. - Priority Manage your task priorities so you never forget important tasks. - Assignee Assign tasks and keep track of who is responsible for them. - Note Include descriptive text for each task to manage the details. - Ready to use No account registration required, start using the app immediately. - Multi-Device Support Sync seamlessly across multiple devices via Google Drive. - Export and share You can export the created Gantt chart, share it, or edit it on your PC. - Import Import and edit exported Gantt chart data. - Dark theme support The app also supports a dark theme, making it ideal for nighttime use.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | iProject Viewer | iGanttChart |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (17 ratings) | 4.0 (23 ratings) — better |
| Positive reviews | 26.0% of reviews | 60.0% of reviews — better |
| Number of ratings | 17 | 23 — better |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 95 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Housatonic.com | YUKI TANAIKE |
Customer experience
iProject Viewer
iGanttChart
In-app purchases
iProject Viewer
- Advanced View-Only1 Month trial$19.991 Year
- Standard Editor1 Month trial$129.991 Year
iGanttChart
- iGanttChart Pro Version Monthly$2.991 Month
- iGanttChart Pro Version Annual$27.001 Year







