Comparison

iProject Viewer vs iGanttChart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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

About

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.

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
Read full description

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

iProject Viewer4 screens
iGanttChart4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
iProject Viewer versus iGanttChart: the parameters behind the verdict, then further details
ParameteriProject VieweriGanttChart
PriceFreeFree
Rating3.7 (17 ratings)4.0 (23 ratings) — better
Positive reviews26.0% of reviews60.0% of reviews — better
Number of ratings1723 — better
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size95 MB51 MB
Age rating4+4+
DeveloperHousatonic.comYUKI TANAIKE

Customer experience

iProject Viewer

All ratings17 ratings
Positive64.7%
Neutral5.9%
Negative29.4%
Written reviews50 reviews
Positive26.0%
Neutral16.0%
Negative58.0%

iGanttChart

All ratings23 ratings
Positive73.9%
Neutral13.0%
Negative13.0%
Written reviews40 reviews
Positive60.0%
Neutral15.0%
Negative25.0%

In-app purchases

2 purchases

iProject Viewer

Subscriptions2
  • Advanced View-Only1 Month trial$19.991 Year
  • Standard Editor1 Month trial$129.991 Year
2 purchases

iGanttChart

Subscriptions2
  • iGanttChart Pro Version Monthly$2.991 Month
  • iGanttChart Pro Version Annual$27.001 Year

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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