Comparison

Cyclope vs HeaderCheck

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

Head to head
About

Cyclope

This utility app uses your iPhone's front camera to detect when someone is looking at your screen. It automatically dims the display to protect your privacy, then brightens it when you're alone. It works in real-time with all your apps, ensuring complete on-device privacy.

Highlights
  • Real-time gaze detection
  • Automatic screen dimming
  • Works with all apps
  • On-device processing
  • One-tap on/off
  • Intuitive interface
Features
Read full description

Cyclope is an intelligent privacy filter for iPhone. It uses the front camera and on-device visual recognition to detect when someone is looking at your screen over your shoulder — and automatically dims it to protect your privacy. HOW IT WORKS Cyclope analyses the field of view of your front camera in real time. As soon as an unauthorised face is detected, the screen gradually dims. It brightens again as soon as you are alone. COMPLETE PRIVACY • No images or biometric data are stored • No network connection — everything happens on your device • No account required • Fully GDPR compliant FEATURES • Intelligent real-time gaze detection • One-tap on/off • Works with all your apps • Clean, intuitive interface Cyclope is built for professionals, travellers, and anyone who cares about their digital privacy.

About

HeaderCheck

Features
Read full description

HeaderCheck reads the hidden headers of an email and tells you, in plain language, whether the sender's domain checked out. Paste the headers and HeaderCheck shows clear Pass, Fail, Softfail or Missing results for SPF, DKIM and DMARC, explains whether the domains line up, and points out anything worth a second look. It does the work on your iPhone or iPad. There's no account and no sign-in, and your headers are never uploaded. WHAT YOU GET FOR FREE • Header analysis for SPF, DKIM and DMARC • Simple explanations of each result • Domain alignment notes • A built-in guide to finding and copying headers HEADERCHECK PRO (ONE-TIME PURCHASE) • Reputation hints: see if the sender's domain comes from a throwaway or free email provider, and which public servers handed the message along • Optional live DNS checks: look up those servers on the SpamCop and PSBL block lists, and check whether the sender's domain publishes SPF, DMARC and MX records. Off until you turn it on in Settings • Open email files from Mail, Files or other apps • Copy a plain-text summary or export a PDF report, hints included • Unlimited History Reputation hints are just that: extra context to help you decide. They never call a message good or bad on their own. PRIVATE BY DESIGN • Analysis happens on your iPhone or iPad • No account, no analytics, no tracking • Headers and message content are never sent to us • Live DNS checks are optional. When they're on, only server addresses and the sender's domain are looked up through your device's normal DNS Available in 14 languages. HeaderCheck reports what's in the headers you give it. It can't promise that a message is safe, and it isn't legal advice. Privacy policy: https://headercheck.app/privacy Support: https://headercheck.app/support

Screenshots

Cyclope4 screens
HeaderCheck4 screens

Verdict

The call

The clearest difference is in-app purchases: Cyclope at none against HeaderCheck's 1. Cyclope also leads on update cadence (every 4 days vs fortnightly) and iOS requirement (16.0 vs 26.0). 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. HeaderCheck sells 1 one-off in-app purchase. Cyclope asks for nothing beyond the download.

UpkeepUpdate frequency

Cyclope ships an update every 4 days, HeaderCheck fortnightly. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
Cyclope versus HeaderCheck: the parameters behind the verdict, then further details
ParameterCyclopeHeaderCheck
PriceFreeFree
Rating3.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better26.0
Further details — not scored
Size1 MB2 MB
Age rating4+4+
DeveloperPrivateerNicholas McLarty

In-app purchases

None

Cyclope

No in-app purchases

1 purchases

HeaderCheck

One-time1
  • HeaderCheck Pro$2.99

Questions

Is Cyclope free?
Cyclope is free to download, with no in-app purchases.
Is HeaderCheck free?
HeaderCheck is free to download, with in-app purchases available.
Do Cyclope or HeaderCheck have ads?
Neither Cyclope nor HeaderCheck shows ads.
Which is updated more often, Cyclope or HeaderCheck?
Cyclope ships an update every 4 days, and HeaderCheck fortnightly. Most recently, Cyclope was updated on October 31, 2026 and HeaderCheck on October 31, 2026.

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