WattCheck: Charger Power Meter
USB-C & Lightning Watt Monitor
About
Estimate real-time charging wattage without extra hardware. Analyze battery percentage rise to understand charger performance and track charging history with detailed charts. Supports multiple languages and prioritizes user privacy.
What's New in WattCheck
1.5.6
June 5, 2026
The latest version offers bug fixes and performance improvements.
In-App Purchases
$1.99
No Ads - Lifetime
A one-time purchase permanently removes the ads.
Developer apps
FAQ
Does WattCheck have ads?
Yes, WattCheck contains advertisements. Users can remove these ads with a one-time purchase.
How accurate are WattCheck's readings?
WattCheck provides estimated wattage based on battery percentage change. Accuracy can be affected by charger quality, cable resistance, ambient temperature, and iOS power management. For best results, keep the app in the foreground and wait for at least a 1% battery increase.
What devices does WattCheck support?
WattCheck is currently supported on iPhone devices.
What is the age rating for WattCheck?
WattCheck has an age rating of 4+.
How often is WattCheck updated?
The latest version, 1.5.6, was released on June 5, 2026, indicating recent updates.
Can I use WattCheck offline?
While the app analyzes charging data, it does not explicitly state offline functionality. However, it emphasizes that battery data stays on the device, suggesting it may function without a constant internet connection for core features.
What are the benefits of the premium version of WattCheck?
The premium option for WattCheck is a one-time purchase to remove advertisements. There are no subscription tiers mentioned.
What does the speedometer gauge in WattCheck represent?
The speedometer gauge in WattCheck shows the estimated watts being delivered to your device in real time, with performance tiers ranging from Bicycle to Jet.