Comparison

PowerDiag vs RayStatus | Phone Diagnostics

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

Head to head
About

PowerDiag

Features
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PowerDiag は、PowerDiag Bluetooth アダプタ(別売)と組み合わせて、電動工具のバッテリーパックの状態を詳しく読み取る診断アプリです。 セル電圧・温度・容量・残量・充電回数などをその場で確認でき、劣化やセル間の電圧ばらつき(不均衡)を見える化します。中古バッテリーの状態チェックや、現場での簡易診断に最適です。 ■ 主な機能 ・各セルの電圧をグリッド表示、電圧差(不均衡)も自動計算 ・パック電圧/残量(SOC)/温度をまとめて表示 ・型番・容量・充電回数・製造情報を自動認識 ・読み取り履歴を端末内に保存 ・日本語/英語/中文に対応 ■ 対応バッテリー ・マキタ XGT ・HiKoki(マルチボルト 36V など) ※対応バッテリーは順次拡大予定です。 ■ ハードウェアが必要です 本アプリのご利用には PowerDiag アダプタ(別売)が必要です。お持ちでない場合も、設定の「デモモード」からサンプルデータでアプリの動作をお試しいただけます。 ■ プライバシー 本アプリは一切のデータを収集・送信しません。読み取った情報はすべて端末内にのみ保存され、オフラインで動作します。

About

RayStatus | Phone Diagnostics

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RayStatus turns what iPhone lets apps read into a set of clear, easy-to-read cards. Every number says where it came from: Live is a reading from iOS right now, Imported carries its date, and Estimate is exactly that. No made-up numbers dressed up as precise. STATUS: IS MY PHONE OK RIGHT NOW? • Battery level and an estimated charging speed, plus free space that matches Settings • A battery temperature range, always labelled Estimate, refined by imported temperature history • Connection status and your latest speed test • Choose which cards to show and in what order DEVICE: WHAT IS THIS IPHONE? • Model, iOS version, processor, memory, display, cameras and sensors • Copy it all, or turn it into a share card for Stories and posts. Serial number and IMEI can't be read by apps, so they never appear TESTS: 15 HARDWARE CHECKS • Dead pixels, screen edges and touch, multi-touch, speaker and earpiece, microphones, camera and flash, vibration, volume buttons, Face ID, charging port, motion sensors, compass and barometer, proximity sensor, location accuracy • "Run every check in order" walks you through them and ends with a single result NETWORK TOOLS • Speed test over Wi‑Fi or cellular: download, upload, and latency at idle and under load • Ping, DNS lookup, route trace, local devices, IP info, port scan, Whois, website response and streaming quality • Connection finder: walk around and compare which spot is smoothest • Bluetooth finder with a direction radar to locate nearby devices TOOLBOX • Sound level meter, level and protractor, NFC read test, flashlight and screen fill light, haptics AI CHECK • Ask in one sentence, like "Why is my battery draining faster lately?" The AI on this iPhone answers from the readings RayStatus has, and nothing is uploaded • 3 free questions a day; after that, each question needs one ad watched to the end. Pro is unlimited • For reference only, not a professional diagnosis. Appears only on supported iPhone models HISTORY • Speed tests, checks, warm spells and low battery are saved to one searchable timeline WIDGETS, LIVE ACTIVITY AND SIRI • Small and medium Home Screen widgets are free; large and Lock Screen widgets come with Pro • A charging Live Activity and Dynamic Island (Pro) • A Control Center speed test button, and Siri: "Test network speed with RayStatus" or "How's my battery in RayStatus" HONEST ABOUT WHAT IOS ALLOWS iOS does not let third-party apps read the actual battery or processor temperature, Wi‑Fi signal strength, or charging wattage. RayStatus shows temperature only as a labelled estimate, and judges Wi‑Fi by latency, loss and speed instead. YOUR DATA STAYS ON YOUR DEVICE • No sign-up, no RayStatus account and no developer-operated server • Readings, history and imported battery data are stored on your iPhone • The app reaches a network test service only when you start a speed test or a network tool • The free tier includes ads; RayStatus Pro removes them RAYSTATUS PRO RayStatus Pro is available only as a monthly or yearly subscription. There is no lifetime purchase. An active subscription unlocks: • No ads • Unlimited history and CSV export • Battery decline curve and health trends • Unlimited AI Check with no ads • Large and Lock Screen widgets and the charging Live Activity Subscriptions renew automatically and can be managed or cancelled in your Apple Account. After cancellation, Pro remains active until the end of the current billing period. Current pricing is shown by the App Store purchase confirmation. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://israynotarray.dev/app/raystatus-privacy.html

Screenshots

PowerDiag4 screens
RayStatus | Phone Diagnostics4 screens

Verdict

The call

The clearest difference is in-app purchases: PowerDiag at none against RayStatus | Phone Diagnostics's 2. PowerDiag also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. RayStatus | Phone Diagnostics sells 2 in-app purchases, starting at $1.99 per month. PowerDiag asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

Scorecard2 real differences · 4 level
PowerDiag versus RayStatus | Phone Diagnostics: the parameters behind the verdict, then further details
ParameterPowerDiagRayStatus | Phone Diagnostics
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 months
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better18.0
Further details — not scored
Size2 MB18 MB
Age rating4+4+
DeveloperQIAN WANPENGRUEI HUNG SHIU

In-app purchases

None

PowerDiag

No in-app purchases

2 purchases

RayStatus | Phone Diagnostics

Subscriptions2
  • RayStatus Pro Monthly$1.991 Month
  • RayStatus Pro Yearly$12.991 Year

Questions

Is PowerDiag free?
PowerDiag is free to download, with no in-app purchases.
Is RayStatus | Phone Diagnostics free?
RayStatus | Phone Diagnostics is free to download, with in-app purchases available.
Do PowerDiag or RayStatus | Phone Diagnostics have ads?
RayStatus | Phone Diagnostics shows ads; PowerDiag does not.
Which is updated more often, PowerDiag or RayStatus | Phone Diagnostics?
PowerDiag ships an update every 2 months, and RayStatus | Phone Diagnostics every 2 months. Most recently, PowerDiag was updated on November 5, 2026 and RayStatus | Phone Diagnostics on November 6, 2026.

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