ProjectKiller vs MPP File Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ProjectKiller
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Open a client's .mpp on your Mac, iPad or iPhone, edit it, and send it back with every byte you didn't touch exactly as Microsoft Project wrote it. ProjectKiller is a native scheduler for Mac, iPad and iPhone, including both screens of iPhone Duo, for people who receive Microsoft Project files and have to return them intact. Real file compatibility Open and save genuine Microsoft Project (.mpp) files — no lossy conversion, no import/export roundtrip surprises. CSV and XML import/export are also built in. Professional scheduling engine Full Critical Path Method (CPM) scheduling with forward and backward pass calculations, so you always know which tasks actually drive your deadline. Task dependencies, recurring tasks, and effort-driven scheduling are all supported. Resource management that catches real problems Over-allocation detection works across every project you have open — not just within a single file — so you can spot when the same person is double-booked across two initiatives before it becomes a crisis. Cost tracking & Earned Value Management Track budget vs. actuals with full EVM metrics — BCWP, BCWS, CV, SV, CPI, and SPI — plus support for up to 10 numbered baselines, matching how Project's own baseline system works. AI-powered planning assistant Describe your project in plain language and get a draft task list. Ask the assistant to resolve resource over-allocations, suggest realistic task durations, or summarize overall project health. Custom views and reporting Build custom views with filters and grouping to see exactly the slice of the project you need, then export clean PDF or PNG reports for stakeholders. Start free with up to 2 projects and 75 tasks each, no credit card required. Upgrade to Pro for larger projects, full .mpp export, and expanded AI usage. Pro is an auto-renewing subscription, billed monthly or annually until cancelled. The perpetual licence and AI credit top-ups are one-time purchases and never renew. Manage or cancel subscriptions in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://projectkiller.app/privacy
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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Open Microsoft Project and Primavera P6 schedules on Mac, iPhone, and iPad and inspect their Gantt charts, tasks, and resources. Export a PDF or CSV when you need to share the project information. READ THE SCHEDULE - Browse and search the task hierarchy - Navigate a pinch-to-zoom Gantt timeline - Inspect dates, durations, hierarchy, and relationships when present - Review resources and assignments when present - Share a PDF report, the Gantt chart as PDF or image, or a task-table CSV - Print the Gantt chart OPENS THESE FILES - Microsoft Project MPP files (MPP8, MPP9, MPP12, MPP14) and MPT templates - Microsoft Project XML (MSPDI) - Primavera P6 XER exports and P6 XML - MPX (Microsoft Project Exchange) PRIVATE BY DESIGN Files are processed locally on your device. GanttPeek has no account, advertising, analytics SDK, cloud parser, or activation server. It reads only the file you select and never writes back to it. EXPLORE SAFELY The fictional Harbor Studio Launch schedule is included with every install, so you can explore the interface and exports before opening a private file. FORMAT NOTES The MPP parser accepts the MPP8, MPP9, MPP12, and MPP14 binary families, including the shared Project 16.x / MPP14 family used by Project 2021, Project 2024, and the Microsoft 365 desktop client. Password-protected MPP files are not supported. Available fields depend on the format: binary MPP files expose fewer details than Project XML or Primavera files, and every gap is disclosed inside the app. GanttPeek is read-only and is not a certified scheduling or contractual-verification system. ONE PROJECT FREE Open one real project with every viewing and export tool. GanttPeek Pro opens every project, with an optional monthly or yearly subscription or a one-time lifetime purchase. GanttPeek is independently developed by Eutopix Labs and is 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: ProjectKiller at none against MPP File Viewer's 4. MPP File Viewer's advantage is update cadence (every 6 days vs every 2 weeks). On price, ads, device support and iOS requirement 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. ProjectKiller asks for nothing beyond the download.
ProjectKiller ships an update every 2 weeks, MPP File Viewer every 6 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | ProjectKiller | MPP File Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | JACKWAGON SURFERS LLC | EUTOPIX LABS |
Customer experience
ProjectKiller
MPP File Viewer
In-app purchases
ProjectKiller
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




