25+ iOS apps curated and reviewed
Every iPhone needs a few good efficiendcphase apps. We benchmark 25+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | May 2026 |
| 2 |  | Free | — | No | No | May 2026 |
| 3 |  | Free | — | No | No | May 2026 |
| 4 |  | Free | — | No | No | May 2026 |
| 5 |  | Free | — | No | No | May 2026 |
| 6 |  | Free | — | — | No | Jul 2026 |
| 7 |  | Free | 5.0★ (4) | No | No | May 2026 |
| 8 |  | Free | 5.0★ (1) | No | No | May 2026 |
Calculate ventilation performance indicators like pressure losses, air velocity, and power consumption in pipe systems. Easily input pipe dimensions, material, and flow rate, then configure resistances from various fittings. Calculations can be saved or emailed, and the app functions offline.
This app promotes a cost-effective, clean energy solution using advanced technologies and innovation. It aims to improve the quality of life for future generations by offering an energy source not dependent on subsidies.
This app calculates electrical transformer performance metrics like current, voltage, efficiency, and regulation. It also offers SI/Metric conversions for various physical quantities and includes a tool for estimating ship dates based on order time.
Access comprehensive energy efficiency information and discover available utility rebates across North America. Quickly find incentives to save money on energy-saving upgrades.
