Cyclope vs HeaderCheck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Real-time gaze detection
- Automatic screen dimming
- Works with all apps
- On-device processing
- One-tap on/off
- Intuitive interface
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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.
HeaderCheck
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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
Verdict
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
Both are free to download. HeaderCheck sells 1 one-off in-app purchase. Cyclope asks for nothing beyond the download.
Cyclope ships an update every 4 days, HeaderCheck fortnightly. Both last shipped on October 31, 2026.
| Parameter | Cyclope | HeaderCheck |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 1 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Privateer | Nicholas McLarty |
In-app purchases
Cyclope
No in-app purchases
HeaderCheck
- HeaderCheck Pro$2.99
Questions
Is Cyclope free?
Is HeaderCheck free?
Do Cyclope or HeaderCheck have ads?
Which is updated more often, Cyclope or HeaderCheck?
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