Comparison

HM01 vs Watt Charging Speed

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HM01

Features
Read full description

This is an application for real-time image transmission and operation control of aircraft through wifi connection. It can take photos and videos remotely. It can also control the movement of the drone in real time, and there are many interesting ways to play

About

Watt Charging Speed

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
Currently charting
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How fast is your charger? Plug in your iPhone or iPad and Watt Charging Speed estimates your charging speed in watts: the power reaching your battery. Tell a fast charger from a slow one, and see whether your cable keeps up. HOW IT WORKS, HONESTLY iPhone and iPad don't let apps read the charging power from the hardware. Watt works out the charging speed from how quickly your battery percentage rises, combined with your device's battery capacity. That means: • The figure is an estimate of the watts reaching the battery. That is less than the charger's rated output: a 20 W charger usually reads below 20 W, and that is expected • iOS reports the battery level in steps, so the first reading can take up to about 10% of charging. After that, the figure follows your charge • The longer a session runs, the steadier the estimate • If Watt doesn't know your device's battery capacity, it says so and uses a typical value WHAT YOU SEE • A watt estimate while you charge • Color-coded speed labels: Fast Charging, Charging, Slow Charging and Trickle Charge • A charging ring and a graph of the session • Estimated time until fully charged • A notice when charging seems to have paused, for example with Optimized Battery Charging COMPARE CHARGERS AND CABLES • Create benchmark tests for a battery range (for example 30% → 80%) and run one with each charger or cable • Compare the results for the same range • See which charger or cable performs best CHARGING HISTORY • Sessions are saved automatically with average watts, duration and battery range • Label each session with the charger you used • Compare sessions over time to spot a slow cable or an aging charger MADE FOR YOUR DEVICE • Has the battery size of every iPhone and iPad that runs iOS 18.6: from iPhone XS to iPhone 18 Pro Max and iPhone Duo, and from older iPads to the latest iPad Pro (M5) • On a few iPhone Pro models Watt asks once whether your iPhone has a SIM card tray, because the battery differs slightly. You can change the answer in Settings • On iPad and an open iPhone Duo, the charging ring and status stay on screen while you switch between Details and Benchmark PRIVATE, ONE PRICE • Pay once: no subscription, no ads, no account • No tracking. All data stays on your device • Works offline FEEDBACK Something looks off, or you have an idea? Tap Send Feedback in Settings or in How It Works. It opens an email with your app version, iOS version and device model filled in. GOOD TO KNOW iOS pauses apps in the background, so keep Watt Charging Speed open while it follows your charge. It keeps the screen awake during a session so nothing is interrupted. Perfect for testing a new charger, finding out why charging feels slow, or settling which of your cables belongs in the drawer.

Screenshots

HM012 screens
Watt Charging Speed3 screens

Verdict

The call

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 (#39 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 8 level
HM01 versus Watt Charging Speed: the parameters behind the verdict, then further details
ParameterHM01Watt Charging Speed
PriceFree — better$1.99
Rating—4.2 (13 ratings) — better
Positive reviews—20.0% of reviews
Number of ratings—13 — better
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#39 — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better18.6
Further details — not scored
Size115 MB3 MB
Age rating4+4+
DeveloperShanTou City Vison Electronictechnology Co., Ltd.Sindre Sørensen

In-app purchases

None

HM01

No in-app purchases

None

Watt Charging Speed

No in-app purchases

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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