Comparison

iProject Viewer vs Project Office X

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

Project Office X

Manage multiple projects efficiently with a full-featured tool based on the Gantt method. Visualize timelines, assign resources, track progress, and identify potential bottlenecks. Offers a free trial and a preview mode after expiration.

Highlights
  • Gantt chart view
  • Outline/Table view
  • Resource and base calendars
  • Resource management
  • Multiple baselines
  • Critical path analysis
  • Project and report sharing
Features
Read full description

Project Office X introduces faster app performance, new implemented features and more responsive interface. The is a full-featured project management app. Based on Gantt method, this app is built to make it easy juggling multiple projects, assign resources, track any remaining work to be done, and head off potential bottlenecks at a glance. FREE TRIAL With the 14-day trial, you can try all of the features of Project Office X for free. After the trial, you can continue using Project Office X in a Preview Mode. BASIC PROJECT MANAGEMENT OPTIONS • Gantt chart view: Each task is shown graphically on visual timeline by day, week, month or year. Gantt chart view helps you keep an eye on tasks durations, start and due dates, completion percentage, dependencies and resources assigned. • Outline view: Use the Table view to see your tasks, groups and milestones in a spreadsheet format. Friendly and intuitive interface helps you get things done fast and stays out of your way while doing so. • Resource and Base calendars: Each project automatically includes a base calendar with some general working hours and a resource calendar that specifies a unique schedule for a specific resource. Project calendars are used to schedule tasks, and if resources are assigned to tasks, resource calendars are used as well. For each resource you can create an individual resource calendars based on the settings in base calendar. • Resources management: add resources to your project: people or materials, necessary to make this project done. Identify bottlenecks in your project and distribute workloads fairly. • Multiple baselines: set baseline to track development by comparing the set baseline with actual plan and progress. • Critical path: Project Office X displays your project’s critical path, which is the series of tasks that are necessary in order to finish your project on schedule. • Customized calendar: modifying work hours for entire project you can create a more realistic plan considering off-time and weekends. • Filtering: you can easily hide those tasks you don't need to think about at the moment. Simply use filter to focus on tasks you need to be done. • Projects and reports sharing: send an entire project to your colleagues or Email the Gantt chart to others as PDF. For more convenience you can make task and resources report and send them as HTML. • iCloud backup: backup your projects to keep all information you have added Project Office X Pro version: • IMPORT/EXPORT Microsoft Project® (XML) Project Office X can export and import files with Microsoft Project® (XML) format. Project Office X does not support export/import MPP files. To use Microsoft Project® (XML) export/import, you need to buy one-time purchase license. • NETWORK DIAGRAM This is a graphical flow of tasks, dependencies and the critical path for a project. It represent a chart with a series of boxes and dependencies lines that connect those boxes. Network diagram view will help you easily map out the project schedule and work sequence, track its progress and completion. For how-to tutorials and other information, please visit our website: https://www.dk-consulting.app/project-office Privacy policy: https://www.dk-consulting.app/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

iProject Viewer4 screens
Project Office X4 screens

Verdict

The call

The clearest difference is rating: iProject Viewer at 3.7 against Project Office X's 1.0. iProject Viewer also leads on ratings volume (17 vs 2). Project Office X's advantage is review sentiment (50% vs 26%) and update cadence (monthly vs every 3 months). On price, ads, in-app purchases and monetization model 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 Project Office X sells 13 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

iProject Viewer holds the better App Store score, 3.7 against 1.0. That said, the two scores are not equally well evidenced: iProject Viewer has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 26% of iProject Viewer's written reviews are positive against 50% of Project Office X's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

iProject Viewer ships an update every 3 months, Project Office X monthly. The most recent releases landed on August 24, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
iProject Viewer versus Project Office X: the parameters behind the verdict, then further details
ParameteriProject ViewerProject Office X
PriceFreeFree
Rating3.7 (17 ratings) — better1.0 (2 ratings)
Positive reviews26.0% of reviews50.0% of reviews — better
Number of ratings17 — better2
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better16.0
Further details — not scored
Size95 MB34 MB
Age rating4+4+
DeveloperHousatonic.comDK CONSULTING, TOV

Customer experience

iProject Viewer

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

Project Office X

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews18 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

2 purchases

iProject Viewer

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

Project Office X

Subscriptions12
  • macOS Standard Monthly$4.991 Month
  • iOS Standard Monthly$4.991 Month
  • macOS + iOS Standard Monthly$7.491 Month
Show 9 more
  • macOS Pro Monthly$9.991 Month
  • iOS Pro Monthly$9.991 Month
  • macOS + iOS Pro Monthly$14.991 Month
  • macOS Standard Yearly$47.991 Year
  • iOS Standard Yearly$59.991 Year
  • macOS + iOS Standard Yearly$74.991 Year
  • macOS Pro Yearly$95.991 Year
  • iOS Pro Yearly$95.991 Year
  • macOS + iOS Pro Yearly$149.991 Year
One-time1
  • Free TrialFree

Questions

Is iProject Viewer free?
iProject Viewer is free to download, with in-app purchases available.
Is Project Office X free?
Project Office X is free to download, with in-app purchases available.
Which has better reviews, iProject Viewer or Project Office X?
iProject Viewer is rated higher. iProject Viewer averages 3.7 out of 5 from 17 ratings, while Project Office X averages 1.0 from 2 ratings.
Do iProject Viewer or Project Office X have ads?
Neither iProject Viewer nor Project Office X shows ads.
Which is updated more often, iProject Viewer or Project Office X?
iProject Viewer ships an update every 3 months, and Project Office X monthly. Most recently, iProject Viewer was updated on August 24, 2026 and Project Office X on September 10, 2026.

Other comparisons