Lean PlanDo Site vs MPP File Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lean PlanDo Site
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Adopt Lean for construction productivity. A simple yet powerful mobile app that helps you to build smarter, faster and better. Features include Personalized Dashboard, Task Insights and Collaboration.
MPP File Viewer
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.
- 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
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Review received schedules before your next meeting. Open Microsoft Project or Primavera files, compare updates and keep decisions beside the plan. REVIEW THE NEXT UPDATE • Inspect Gantt charts, task dates and available resources. Share PDF reports and CSV tables. • Group saved revisions and compare an update with your reviewed baseline. • Save weekly minutes and carry open actions forward with owners and due dates. Reviewed minutes keep a fixed copy of what was discussed. BRING IN A SPREADSHEET Choose an XLSX sheet, heading row and task columns, then check every task row before opening. Selected formula and error cells are rejected; formulas are not calculated. CSV, TSV and tab-delimited TXT can also use column mapping. CREATE A SMALL PLAN Set task names, dates, progress and notes in an editable local draft. Valid drafts save automatically. Export CSV or Project XML with manual task dates. There is no MPP writing or dependency rescheduling. ONE DISTINCT FILE FREE Open one distinct file free and reopen that unchanged file. A changed revision counts as a new file. For more files, choose an annual or monthly subscription, a nonrenewing seven-day pass or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled; the seven-day pass does not renew. Prices and terms appear before purchase. LOCAL PROCESSING AND YOUR CHOICES Received originals stay read-only; created drafts are editable. File processing and meeting notes are local. Basic usage sharing is optional, off by default and changeable in settings. Usage counts contain no document text or recordings. No account is required. FORMAT AND LANGUAGE NOTES Opens MPP/MPT, Project XML, Primavera XER/P6 XML, MPX and supported tables. XLSX limits include 25 MiB input and 25,000 task rows; XLS, XLSM and encrypted workbooks are not supported. Password-protected MPP is not supported. Available fields depend on the source. This is not a certified scheduling or contractual-verification system. App interface: English, German, French, Spanish, Italian, Brazilian Portuguese, Polish, Japanese and Simplified Chinese. Other language settings use a supported language or English. Independently developed by Eutopix Labs. Not affiliated with, endorsed by, sponsored by or certified by Microsoft or Oracle. Primavera is a registered trademark of Oracle. Terms of Use: https://ganttpeek.com/terms/ Privacy Policy: https://ganttpeek.com/privacy/
Screenshots
Verdict
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.
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. 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.
| Parameter | Lean PlanDo Site | MPP File Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 22 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Lean Station Pte Ltd | EUTOPIX LABS |
In-app purchases
Lean PlanDo Site
No in-app purchases
MPP File Viewer
- GanttPeek Pro (Monthly)$5.991 Month
- GanttPeek Pro (Yearly)$19.991 Year
- GanttPeek Pro 7-Day Pass$4.99
- GanttPeek Lifetime$39.99








