Calculate estimated battery run time based on capacity and device consumption. Determine battery capacity from stored energy and voltage, and calculate required battery ratings based on load and duration.






249+ iOS apps curated and reviewed
Out of 249+ battery materials toolkit apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | β | No | No | Aug 2026 | ||
| 2 | $2.99 | 1.5β (4) | No | No | Jun 2026 | ||
| 3 | Free | 4.5β (12K) | Yes | Yes | Oct 2026 | ||
| 4 | Free | β | No | No | May 2026 | ||
| 5 | Free | 4.5β (182) | No | Yes | Oct 2026 | ||
| 6 | Free | β | No | Yes | Oct 2026 | ||
| 7 | Free | β | No | Yes | Oct 2026 | ||
| 8 | Free | 4.8β (42) | Yes | Yes | Oct 2026 |












Calculate estimated battery run time based on capacity and device consumption. Determine battery capacity from stored energy and voltage, and calculate required battery ratings based on load and duration.






This app helps you understand your iOS device's battery performance. It identifies battery runtimes and provides data to help you determine if your battery needs replacement. Monitor your device's battery health and runtime with detailed insights.