Comparison

BlankState Diagnostic vs Semaphor

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

Head to head
About

BlankState Diagnostic

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BlankState Diagnostic is a comprehensive mobile device hardware testing tool designed for ITAD operators, refurbishers, and enterprise IT teams. Launched as an App Clip from a QR code, it runs 33 hardware diagnostic tests across sensors, cameras, display, audio, connectivity, and biometrics โ€” with no App Store download required. AUTOMATED TESTS โ€ข Wi-Fi, Bluetooth, GPS, Cellular, Ultra Wideband โ€ข Accelerometer, Gyroscope, Magnetometer, Barometer โ€ข Battery, Storage, True Tone, ProMotion, LiDAR โ€ข Touch ID / Face ID, Wireless Charging SEMI-AUTOMATED TESTS โ€ข Flashlight (camera-verified light emission) โ€ข Brightness range, Proximity sensor, Ambient light โ€ข Earpiece audio path, Volume buttons, Taptic Engine USER-ASSISTED TESTS โ€ข Touchscreen grid with multi-touch verification โ€ข Display colour cycle for dead pixel detection โ€ข OLED burn-in, uniformity, and ghost touch detection โ€ข Speaker and microphone with auto-detection โ€ข All camera lenses including rear microphone Results are sent directly to the BlankState Mac application for inclusion in certified device health reports. Designed for R2v3 and ADISA compliance workflows.

About

Semaphor

Features
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Semaphor answers simple question: Are my websites online and running? Stop finding out your site is down from a customer email. PERFECT FOR - Business owners wanting to know if their store is online - Agencies and freelancers watching client websites - Indie makers watching their own sites and landing pages - Developers watching endpoints and APIs FRESH WIDGETS Semaphor has beautiful widgets so you can see your status anywhere on your screen. Pick your refresh interval and turn on notifications so you never miss alert. THE APP IS YOUR DASHBOARD Add and organize your sites, see them all on one board, and tap any site for its response time, its recent checks and the latest HTTP result. Tap refresh to re-check every site at once. TELLS YOU WHEN IT BREAKS Turn on down alerts and Semaphor notifies you when a site goes red. Quiet hours hold alerts back overnight, and you can mute one site while you are busy fixing it. SSL CERTIFICATES BEFORE THEY EXPIRE See how many days are left on a site's SSL certificate and who issued it, and get a warning 14 days and 3 days before it expires. UPTIME HISTORY Uptime over 7 and 30 days, total downtime, the longest outage and the average response time, per site and across all of them. PRIVATE BY DESIGN No account, no sign-up. Semaphor contacts the websites you add and nothing else, and it stores your list and results on your device. No analytics, no tracking, no data collected about you. Ever. UPGRADE IF YOU NEED MORE Full version contains: Unlimited sites, down alerts, quiet hours, every check interval, website history, every widget size including Lock Screen. REQUIREMENTS - iPhone and iPad - iOS 17 or later - Free to download, no account required

Screenshots

BlankState Diagnostic4 screens
Semaphor4 screens

Verdict

The call

The clearest difference is in-app purchases: BlankState Diagnostic at none against Semaphor's 1. BlankState Diagnostic also leads on update cadence (every 4 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Semaphor sells 1 one-off in-app purchase. BlankState Diagnostic asks for nothing beyond the download.

UpkeepUpdate frequency

BlankState Diagnostic ships an update every 4 days, Semaphor every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences ยท 4 level
BlankState Diagnostic versus Semaphor: the parameters behind the verdict, then further details
ParameterBlankState DiagnosticSemaphor
PriceFreeFree
Update frequencyEvery 4 days โ€” betterEvery 2 months
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 โ€” better
Further details โ€” not scored
Size1 MB10 MB
Age rating4+4+
DeveloperBlankStateBEGRIP

In-app purchases

None

BlankState Diagnostic

No in-app purchases

1 purchases

Semaphor

One-time1
  • Semaphor Lifetime$3.99

Questions

Is BlankState Diagnostic free?
BlankState Diagnostic is free to download, with no in-app purchases.
Is Semaphor free?
Semaphor is free to download, with in-app purchases available.
Do BlankState Diagnostic or Semaphor have ads?
Neither BlankState Diagnostic nor Semaphor shows ads.
Which is updated more often, BlankState Diagnostic or Semaphor?
BlankState Diagnostic ships an update every 4 days, and Semaphor every 2 months. Most recently, BlankState Diagnostic was updated on October 24, 2026 and Semaphor on October 25, 2026.

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