# ProjectSlack — Critical Path

> Critical Path (iPhone/iPad app by QBS SYSTEM LIMITED.)

- Source: https://appshunter.io/ios/app/projectslack/id1475055539 (this page in markdown: same URL + `.md`)
- Developer: [QBS SYSTEM LIMITED](https://appshunter.io/developer/957725636)
- Category: Productivity, Business
- Price: Free
- Age rating: 4+
- Requires: iOS 9.3 · 27 MB
- Languages: English
- Released: 2019-10-14
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/projectslack/id1475055539/reviews.md

## What is ProjectSlack?

In just 3 simple steps:
1. Estimate tasks and durations
2. Form project network
3. Analyze paths and slacks

The ProjectSlack iPad app lets project professionals quickly map out their Project Networks. The app then auto-identify the Critical Path, and the Slacks of other Paths.

ProjectSlack also comes with a companion iPhone app, which could temporarily store the data in a file, partially viewing it, and later share it to an iPad when available.

The app comes with a Sample Project Network, that users could quickly learn to use the app.


## Version history (last 2 releases)

### 1.1 — 2019-10-16

1. Improved UX when user shares .pjsk file by email.
2. Fixed a bug when user air-drops a .pjsk file, the received thumbnail was not updated.

### 1.0 — 2019-10-11

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*