Comparison

Barometer ∞ Pressure Altitude vs Relay Shield

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

Head to head
About

Barometer ∞ Pressure Altitude

Access your device's built-in barometer for real-time atmospheric pressure and altitude readings. Offers multiple units and works offline without requiring signup or subscriptions.

Highlights
  • Live barometric pressure readings
  • Current altitude display
  • Multiple pressure units (atm, hPa, kPa, Bar)
  • Offline functionality
  • Native iOS design
  • Minimalist interface
Read full description

Your iPhone already has a barometer. Use it. Barometer ∞ gives you instant, accurate atmospheric pressure readings and your current altitude — straight from the device's built-in sensor. No signup, no subscription, no fuss. • Live barometric pressure, updated in real time • Current altitude in meters, powered by the same sensor pilots trust • Four pressure units — pick Standard Atmosphere (atm), Hectopascals (hPa), Kilopascals (kPa), or Bar • Works offline — no internet or location required to read pressure • Native iOS design built for iOS 17 and later • Tiny download and zero clutter Great for: — Hikers and climbers curious about elevation — Weather watchers tracking pressure shifts — Students, teachers, and anyone learning about atmospheric science — Anyone who wants a clean, fast reading without wading through ads-riddled "pro" alternatives Barometer ∞ is intentionally simple. It does one thing — show you what your iPhone's pressure sensor sees — and it does it instantly. No cluttered dashboards, no weather forecasts you didn't ask for, no dark-pattern paywalls. Privacy Policy: https://triplegelato.notion.site/Privacy-Policy-182d18371d6181b588d4ed7dbd0ba832 Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Relay Shield

This app helps you block unwanted adult content across your iPhone, including within apps and Safari. It uses on-device detection and Screen Time controls to enforce your chosen boundaries, offering accountability features and personalized reminders.

Highlights
  • On-device content detection
  • Screen Time integration
  • App and website protection
  • Accountability alerts
  • Personalized reminders
  • Passcode protection
  • Quick start from Control Center
Features
Read full description

Relay Shield is the companion app to Relay! It helps you keep unwanted content off your iPhone, in Safari and inside the apps that ordinary filters can't reach. Most blockers stop at a list of websites. Relay Shield adds on-device content detection and Screen Time controls, so the apps you choose to protect stay protected while you use them, not just when you avoid them. HOW IT WORKS Choose the apps and websites you want to protect. They stay locked until you start a monitoring session. During a session, Relay Shield periodically checks the screen for sensitive content. If it finds something, you get a warning notification first. If the content continues, a safety lock closes the protected apps for a cooldown period you set. EVERYTHING STAYS ON YOUR DEVICE Detection runs entirely on your iPhone using an on-device model. Screen images are never uploaded, and we never see them. The only thing that can leave your phone is an alert you've chosen to send. SCREEN TIME LIMITS AND SCHEDULES Set daily time limits and blocking schedules for any app or category, enforced by Apple's Screen Time framework. ACCOUNTABILITY, ON YOUR TERMS Relay Shield works alone, and it works better with someone in your corner. Connect your Relay account to send a supporter or your Relay team a red flag when sensitive content is detected. They get the signal that you could use a check-in, not a log of what you were doing. YOUR WHY Keep a photo, a message, a verse, or a self-care reminder inside Shield. It's the first thing you see when the safety lock activates. PASSCODE PROTECTION Set a PIN to protect your shielded app list and the safety lock, so an impulsive moment can't undo a decision you made when you were thinking clearly. FAST TO START Begin a monitoring session from Control Center, the Action Button, or a Home Screen quick action. Protection that takes one tap is protection you'll actually use. WHO IT'S FOR Anyone who wants stronger boundaries around explicit content and more intentional screen time, whether you're working on a habit, supporting your recovery, or just tired of blockers that are easy to switch off and hard to live with. IMPORTANT Relay Shield uses Apple's Screen Time and screen broadcast frameworks. Monitoring requires a one-time Screen Time authorization and a short setup, and Safari protection requires enabling the Relay Shield Safari extension. Relay Shield does not generate, host, or provide explicit content; it exists only to help you avoid it. Relay Shield is free to use. A Relay account is optional and only needed for supporter alerts.

Screenshots

Barometer ∞ Pressure Altitude1 screens
Relay Shield4 screens

Verdict

The call

The clearest difference is ads: Relay Shield at none against Barometer ∞ Pressure Altitude's shown. Relay Shield also leads on update cadence (every 2 weeks vs every 10 months) and monetization model (free vs ad-supported). On price, rating, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Barometer ∞ Pressure Altitude against 4.9 for Relay Shield. That said, the two scores are not equally well evidenced: Relay Shield has 8 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Barometer ∞ Pressure Altitude ships an update every 10 months, Relay Shield every 2 weeks. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.

Scorecard4 real differences · 6 level
Barometer ∞ Pressure Altitude versus Relay Shield: the parameters behind the verdict, then further details
ParameterBarometer ∞ Pressure AltitudeRelay Shield
PriceFreeFree
Rating5.0 (1 ratings) — better4.9 (8 ratings)
Positive reviews—100.0% of reviews
Number of ratings18 — better
Update frequencyEvery 10 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details — not scored
Size16 MB64 MB
Age rating4+4+
DeveloperFawkes WeiRelay Health Inc

Customer experience

Barometer ∞ Pressure Altitude

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Relay Shield

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Barometer ∞ Pressure Altitude

No in-app purchases

None

Relay Shield

No in-app purchases

Questions

Is Barometer ∞ Pressure Altitude free?
Barometer ∞ Pressure Altitude is free to download, with no in-app purchases.
Is Relay Shield free?
Relay Shield is free to download, with no in-app purchases.
Which has better reviews, Barometer ∞ Pressure Altitude or Relay Shield?
Barometer ∞ Pressure Altitude is rated higher. Barometer ∞ Pressure Altitude averages 5.0 out of 5 from 1 ratings, while Relay Shield averages 4.9 from 8 ratings.
Do Barometer ∞ Pressure Altitude or Relay Shield have ads?
Barometer ∞ Pressure Altitude shows ads; Relay Shield does not.
Which is updated more often, Barometer ∞ Pressure Altitude or Relay Shield?
Barometer ∞ Pressure Altitude ships an update every 10 months, and Relay Shield every 2 weeks. Most recently, Barometer ∞ Pressure Altitude was updated on November 8, 2026 and Relay Shield on November 10, 2026.

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