Comparison

YaWatt vs WattCheck

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

Head to head
About

YaWatt

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YaWatt brings real-time monitoring, control and intelligent scheduling to PV, battery storage and diesel-hybrid systems. Designed for residential and commercial deployments, YaWatt helps you maximize solar usage, protect batteries, and manage diesel backup efficiently. Key features: - Live energy flow visualization: See PV, grid, load and battery flows in an intuitive chart. - System status and alerts: Get notified on thresholds (temperature, SOC) and critical device alarms. - Storage scheduling: Create time-based charge/discharge plans to optimize energy cost and efficiency. - Diesel generator strategy: Configure auto-start/stop SOC thresholds and generator power settings. - Firmware & device management: View firmware versions and device telemetry in one place. - Emergency stop: Safely stop devices from the app (requires device connectivity). - Multi-device overview: Dashboard and detailed views for every site.

About

WattCheck

This app helps you test and compare your charging cables and power adapters. It estimates charging performance over time, allowing you to rank your cables and identify the best and weakest charging gear. Clean up your cable drawer and stop guessing which cable is slowing you down.

Highlights
  • Charging performance test
  • 5, 10, and 20 minute results
  • Cable ranking
  • Best and weakest cable detection
  • Charger comparison
  • Test history
  • CSV export
Features
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WattCheck helps you understand which charging cables and power adapters actually perform well. Have a drawer full of USB-C and Lightning cables? Not sure which one charges fast, which one is slow, and which one may be worn out? WattCheck makes it easy to test and compare your charging setup using real-world battery charging behavior. Start a test, keep your device connected, and WattCheck estimates charging performance over 5, 10, and 20 minute windows. Save results for each cable and charger, build a personal cable ranking, and quickly spot weak or inconsistent charging gear. KEY FEATURES • Charging Performance Test Run simple charging tests and see estimated speed in % per hour and normalized watt estimates. • 5, 10 and 20 Minute Results Get quick early feedback after 5 minutes, better accuracy after 10 minutes, and stronger comparison data after 20 minutes. • Cable Ranking Save tests for different cables and automatically rank them by performance. • Best and Weakest Cable Detection WattCheck highlights your best-performing cable and helps identify cables that may be slow, weak, or degraded. • Charger Comparison Name your power adapters and compare how different chargers perform with different cables. • Test History Keep a complete history of your charging tests, including cable name, charger name, device profile, battery change, duration, estimated power, and notes. • Charts View charging progress and speed charts to better understand each test. • Device Profiles Choose your iPhone or iPad model so WattCheck can use the correct battery capacity for better estimates. • Smart Warnings WattCheck warns you when a test may be less reliable, such as when battery level is above 80%, where iOS may reduce charging speed. • CSV Export Export your test history for personal tracking, troubleshooting, or comparison. HOW IT WORKS WattCheck uses public iOS battery information to estimate charging performance based on battery level changes over time. It does not require special hardware and does not use private system APIs. For best results: • Test between 20% and 70% battery • Use the same device when comparing cables • Use the same charger when comparing cables • Keep the device temperature normal • Run longer tests for better accuracy IMPORTANT NOTE WattCheck does not directly read USB voltage, current, or USB Power Delivery data. iOS does not provide this information to regular App Store apps. WattCheck estimates real-world charging performance based on battery level changes, making it useful for comparing cables and chargers in everyday conditions. PREMIUM WattCheck Premium unlocks unlimited charging tests, full history, cable ranking, charts, charger comparison, and CSV export. Use WattCheck to clean up your cable drawer, find your best charger setup, and stop guessing which cable is slowing you down. Subscription Plans: - Payment will be charged to your App Store Account at confirmation of purchase. - Your subscription will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current subscription period. - Your account will be charged for renewal within 24 hours prior to the end of the current subscription period. Automatic renewals will cost the same price you were originally charged for the subscription. - Manage or cancel your subscription from your user settings in the App Store at any time after purchasing. - Any unused portion of a free trial will be forfeited if you purchase a subscription. Privacy Policy: https://sunteame.com/privacy-policy/ Terms of Use: https://sunteame.com/terms-of-service/ If you have questions or feature requests, use the support link in the app to contact us.

Screenshots

YaWatt4 screens
WattCheck4 screens

Verdict

The call

The clearest difference is in-app purchases: YaWatt at none against WattCheck's 3. YaWatt also leads on update cadence (fortnightly vs every 5 weeks) and iOS requirement (15.1 vs 18.0). On price, ads 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

Both are free to download. WattCheck sells 3 in-app purchases, starting at $1.99 per 7 days. YaWatt asks for nothing beyond the download.

UpkeepUpdate frequency

YaWatt ships an update fortnightly, WattCheck every 5 weeks. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 6 level
YaWatt versus WattCheck: the parameters behind the verdict, then further details
ParameterYaWattWattCheck
PriceFreeFree
Rating—1.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.0
Further details — not scored
Size54 MB16 MB
Age rating4+4+
Developer朝轩 付SUN TEAME PTE. LTD.

In-app purchases

None

YaWatt

No in-app purchases

3 purchases

WattCheck

Subscriptions3
  • WattCheck Premium Weekly$1.997 Days
  • WattCheck Premium Monthly$5.991 Month
  • WattCheck Premium Yearly$29.991 Year

Questions

Is YaWatt free?
YaWatt is free to download, with no in-app purchases.
Is WattCheck free?
WattCheck is free to download, with in-app purchases available.
Do YaWatt or WattCheck have ads?
Neither YaWatt nor WattCheck shows ads.
Which is updated more often, YaWatt or WattCheck?
YaWatt ships an update fortnightly, and WattCheck every 5 weeks. Most recently, YaWatt was updated on October 25, 2026 and WattCheck on October 7, 2026.

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