# HM01 vs Watt Charging Speed

The clearest difference is price: HM01 at Free against Watt Charging Speed's $1.99. HM01 also leads on iOS requirement (12.0 vs 18.6). Watt Charging Speed's advantage is chart position (#43 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

HM01 is free to download; Watt Charging Speed costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HM01 ships an update fortnightly, Watt Charging Speed every 3 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | HM01 | Watt Charging Speed |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[4.2 (13 ratings)](https://appshunter.io/ios/app/watt-charging-speed/id6760211479/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Paid |
| Best chart rank | — | **#43** |
| Size | 115 MB | 3 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ShanTou City Vison Electronictechnology Co., Ltd.](https://appshunter.io/developer/1388222999) | [Sindre Sørensen](https://appshunter.io/developer/1881331882) |

## What reviewers say

### HM01

[App page](https://appshunter.io/ios/app/hm01/id6749028679)

**Features:** macOS Compatibility

**In-app purchases:** none


### Watt Charging Speed

[App page](https://appshunter.io/ios/app/watt-charging-speed/id6760211479)

**Currently charting:** #43 Top Paid · Utilities (US App Store)

Monitor your device's charging speed in real-time watts. Compare chargers, track charging history, and estimate time to full charge. This app is private by design, with no ads or tracking.

**Highlights:** Real-time wattage display, Color-coded speed indicator, Estimated time to full charge, Benchmark different chargers, Charging history tracking, Offline functionality

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is HM01 free?

HM01 is free to download, with no in-app purchases.

### Is Watt Charging Speed free?

Watt Charging Speed costs $1.99, with no in-app purchases.

### Do HM01 or Watt Charging Speed have ads?

Neither HM01 nor Watt Charging Speed shows ads.

### Which is updated more often, HM01 or Watt Charging Speed?

HM01 ships an update fortnightly, and Watt Charging Speed every 3 weeks. Most recently, HM01 was updated on October 25, 2026 and Watt Charging Speed on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*