81+ iOS apps & games curated and reviewed
With an average user rating of 4.1★, the freeflow mechanical category is one of the App Store's strongest. Browse all 81+ apps and games we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | Aug 2026 | |
| 2 |  | Free | — | Yes | Yes | Oct 2026 | |
| 3 |  | Free | 1.3★ (7) | No | No | Oct 2026 | |
| 4 |  | Free | 4.6★ (122K) | No | Yes | Nov 2026 | |
| 5 |  | Free | — | No | No | Sep 2026 | |
| 6 |  | Free was $9.99 | — | No | Yes | Oct 2026 | |
| 7 |  | Free | 4.0★ (12) | No | No | Nov 2026 | |
| 8 |  | Free | 5.0★ (3) | No | No | May 2026 |
This tool helps engineers and plumbers accurately size water systems by calculating peak water demand. It accounts for water-efficient fixtures and appliances, allowing for custom flow rate adjustments and the addition of unlisted fixtures. Results can be saved and emailed.
