# Lean PlanDo Site vs MPP File Viewer

The clearest difference is in-app purchases: Lean PlanDo Site at none against MPP File Viewer's 4. Lean PlanDo Site also leads on iOS requirement (15.6 vs 17.0). MPP File Viewer's advantage is update cadence (every 6 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. MPP File Viewer sells 4 in-app purchases, starting at $5.99 per month. Lean PlanDo Site asks for nothing beyond the download.

Lean PlanDo Site ships an update every 2 months, MPP File Viewer every 6 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Lean PlanDo Site | MPP File Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/mpp-file-viewer-gantt-chart/id6799043030/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 22 MB | 13 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Lean Station Pte Ltd](https://appshunter.io/developer/1211962440) | [EUTOPIX LABS](https://appshunter.io/developer/1896294696) |

## What reviewers say

### Lean PlanDo Site

[App page](https://appshunter.io/ios/app/lean-plando-site/id1211962441)

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

**In-app purchases:** none


### MPP File Viewer

[App page](https://appshunter.io/ios/app/mpp-file-viewer-gantt-chart/id6799043030)

View and inspect Gantt charts, tasks, and resources from Microsoft Project and Primavera P6 schedule files on your Apple devices. Export project information as PDF or CSV for easy sharing. Files are processed locally for privacy.

**Highlights:** Open MPP, MPT, MSPDI, XER, P6 XML, and MPX files, Inspect Gantt charts, tasks, and resources, Browse task hierarchy, Navigate pinch-to-zoom Gantt timeline, Export as PDF or CSV, Print Gantt charts

**Features:** Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GanttPeek Pro (Monthly) | $5.99 | per month |
| GanttPeek Pro (Yearly) | $19.99 | per year |
| GanttPeek Pro 7-Day Pass | $4.99 | one-time |
| GanttPeek Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Lean PlanDo Site free?

Lean PlanDo Site is free to download, with no in-app purchases.

### Is MPP File Viewer free?

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

### Do Lean PlanDo Site or MPP File Viewer have ads?

Neither Lean PlanDo Site nor MPP File Viewer shows ads.

### Which is updated more often, Lean PlanDo Site or MPP File Viewer?

Lean PlanDo Site ships an update every 2 months, and MPP File Viewer every 6 days. Most recently, Lean PlanDo Site was updated on November 2, 2026 and MPP File Viewer on October 31, 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.*