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Best 2 Monitor Apps

217+ iOS apps curated and reviewed

4.5 avg rating
19 free apps
Updated April 2026

Looking for free 2 monitor apps? 19 of our 217+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for 2 Monitor

Device Monitor²#1

Device Monitor² by Marco Ricca

System activity info
Editor's Choice
🛠️ Developer Tools
4.7😊(9K ratings)
FreeIn-App Purchases
#25in Developer Tools
Device Monitor² screenshot 1
Device Monitor² screenshot 2
Device Monitor² screenshot 3
Device Monitor² screenshot 4
Device Monitor² screenshot 5
Device Monitor² screenshot 6

This app provides comprehensive system activity information for Apple devices, including detailed insights into hardware, sensors, and network status. It offers privacy controls, customizable widgets, and advanced testing and reporting features through optional in-app purchases.

What We Love

  • 🚀 Effective RAM cleaning
  • 🔍 Detailed device information
  • 🔧 Useful toolkit features
  • 💰 Fair one-time pricing

Room to Improve

  • 🐛 RAM cleaning issues after updates
  • 🔌 High background battery usage
  • 🕰️ Slow RAM cleaning process
Annie Baby Monitor: Nanny Cam#2

Annie Baby Monitor: Nanny Cam by Annie Baby Apps s.r.o.

Baby Video Camera - WiFi Cloud
Strong Contender
🌟 Lifestyle
4.4😐(2.4K ratings)
FreeAdsIn-App Purchases
Annie Baby Monitor: Nanny Cam screenshot 1
Annie Baby Monitor: Nanny Cam screenshot 2
Annie Baby Monitor: Nanny Cam screenshot 3
Annie Baby Monitor: Nanny Cam screenshot 4
Annie Baby Monitor: Nanny Cam screenshot 5
Annie Baby Monitor: Nanny Cam screenshot 6

Transform your devices into a powerful baby monitor with live HD video and audio. Receive real-time alerts for sound and motion, and soothe your baby with two-way talk and lullabies. Track sleep patterns and log daily routines for comprehensive care.

What We Love

  • 🚀 Reliable and easy to use
  • 💡 Convenient for travel and multiple devices
  • 👍 Clear audio and video quality
  • 🚀 Affordable alternative to traditional baby monitors

Room to Improve

  • 🐛 Frequent disconnections and connection issues
  • 🔋 High battery consumption
  • 🔒 Concerns about security and privacy
BlueDriver OBD2 Scan Tool#3

BlueDriver OBD2 Scan Tool by Root Four Imagination Inc.

Fear No Fix™
Worth Considering
📊 Productivity
4.6😊(14K ratings)
Free
BlueDriver OBD2 Scan Tool screenshot 1
BlueDriver OBD2 Scan Tool screenshot 2
BlueDriver OBD2 Scan Tool screenshot 3
BlueDriver OBD2 Scan Tool screenshot 4
BlueDriver OBD2 Scan Tool screenshot 5

This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.

What We Love

  • 👍 Easy to use
  • 🚀 Excellent diagnostic capabilities
  • 💰 Great value for money
  • 🔍 Detailed fault code information

Room to Improve

  • 🐛 Occasional Bluetooth connectivity issues
  • ⚠️ Limited support for some vehicle makes/models
  • 🚫 Cannot read odometer information

More 2 Monitor apps to explore

4
QTAKE Monitor
QTAKE Monitor
QTAKE Monitor
by IN2CORE s.r.o.
Free

Transforms multiple devices into wireless on-set monitors for video production. Enables real-time multi-camera monitoring, communication with the operator, and collaborative metadata editing. Offers a low-latency viewing experience for both 2D and immersive 3D content.

Wireless on-set monitoring for up to 160 devicesMulti-camera monitoring and TALKBACK communicationLow latency streaming with QTAKE STREAM Module
📷 Photo & Video
(8)
free
5
War Monitor for Helldivers 2
War Monitor for Helldivers 2
War Monitor for Helldivers 2
Featuring STRATAGEM HERO!
Free

This companion app provides real-time updates on the Helldivers 2 war, including planet statuses, major orders, and strategic insights. It also features an addictive Stratagem Hero mini-game with leaderboards and an Apple Watch integration.

Real-time war updatesPlanet status and liberation trackingMajor Order monitoring
🎬 Entertainment
(9.5K)
free
6
S2 System Status Monitor Lite with usage Widget battery charge and Memory data Manager Info
S2 System Status Monitor Lite with usage Widget battery charge and Memory data Manager Info
S2 System Status Monitor Lite with usage Widget battery charge and Memory data Manager Info
by NIVIN REGI
Free

Monitor your iOS device's system status with detailed information on disk, network, cellular data, and RAM. View real-time specifications like battery, boot time, and uptime. This app offers an elegant and simple interface for offline use.

Disk Information (Capacity, Used, Available)Network Information (IP, SSID, External IP)Cellular Data Details
🔧 Utilities
(2.1K)
free with in-app purchases
7
Blood Oxygen | O2 Monitor app+
Blood Oxygen | O2 Monitor app+
Blood Oxygen | O2 Monitor app+
Saturation Level + Pulse Rate
Free

Track your blood oxygen saturation (SpO2) and pulse rate daily. Log readings from your oximeter, monitor your normal range, and stay informed about your health. Features include a log diary, multi-profile support, and Apple Health synchronization.

Log oxygen saturation (SpO2) and pulse rateFast and accurate pulse measurementMulti-profile support for family members
🏥 Medical
(379)
freemium
8
Hear My Baby Heartbeat App 2.0
Hear My Baby Heartbeat App 2.0
Hear My Baby Heartbeat App 2.0
Pregnancy Baby Heart Monitor
$6.99
$9.99 | 30% OFF

Listen to your baby's heartbeat at home using your iPhone's microphone. This app provides AI-powered guidance and tutorials to help you find and record fetal heartbeats. Create keepsake videos and share precious moments with loved ones.

Hear baby's heartbeat with iPhone microphoneAI chat support for real-time tipsTailored pregnancy tutorials
🏥 Medical
(7.3K)
free with in-app purchases
9
True Pulse Heart Rate Monitor
True Pulse Heart Rate Monitor
True Pulse Heart Rate Monitor
#1 Blood Pressure & O2 Logger
Free

Instantly measure your heart rate using your phone's camera. Track your health, view pulse waveforms, and access mental health tests. Premium offers unlimited features and supports a family business.

Instant heart rate monitoringPulse waveform graphsMental health tests
💪 Health & Fitness
(2.2K)
freemium
10
Baby Monitor Nancy: Cloud Cam
Baby Monitor Nancy: Cloud Cam
Baby Monitor Nancy: Cloud Cam
Nanny Video Babysitting Camera
Free

Transform two iOS devices into a secure audio and video baby monitor. Keep an eye and ear on your little one from anywhere, with features like night mode and two-way talk. Receive instant notifications for sounds and disconnections.

Live stream video2-way audioUnlimited reach
🌟 Lifestyle
(519)
free with in-app purchases
11
CO2 Monitor 2
CO2 Monitor 2
CO2 Monitor 2
by himpel
Free
🌟 Lifestyle
(0)
12
Status Monitor
Status Monitor
Status Monitor
Device,Activity,CPU,Usage info
Free

Monitor your iPhone, iPad, Apple Watch, and Apple TV's performance with detailed insights into thermal states, memory, CPU, network, and storage usage. Offers a user-friendly interface with light and dark themes, plus customizable widgets for quick access to key information.

Thermal state monitoring with alertsDetailed memory and CPU usage graphsNetwork activity and storage tracking
🔧 Utilities
(18)
free with in-app purchases
13
Heart Rate Monitor: Pulse
Heart Rate Monitor: Pulse
Heart Rate Monitor: Pulse
Blood Pressure & ECG Watch, O2
Free

Track your heart rate and blood pressure using your iPhone camera. Log your health data, view pulse waveforms, and calculate BMI. Access heart-healthy recipes and relaxing music.

Heart rate measurement via iPhone cameraApple Watch synchronizationBlood pressure and oxygen saturation logging
💪 Health & Fitness
(6.7K)
free with in-app purchases
14
Baby Monitor Nani: Nanny Cam
Baby Monitor Nani: Nanny Cam
Baby Monitor Nani: Nanny Cam
Video Baby Monitor: 2 phones
Free

Transform two phones into a powerful video baby monitor. Watch and listen to your baby at home or on the go, with features like sound and motion detection, two-way communication, and optional cloud event recording. Ideal for travel or as a backup.

Two-phone video monitoringWatch and listen anywhereSound and motion detection alerts
🌟 Lifestyle
(66)
subscription
15
OBD2 Car Scanner - EOBD Facile
OBD2 Car Scanner - EOBD Facile
OBD2 Car Scanner - EOBD Facile
Torque ELM327 Diagnostic Tool
Free

Transform your smartphone into a professional car diagnostic tool. Read and clear engine fault codes, monitor real-time sensor data, and perform advanced diagnostics without a mechanic. Supports a wide range of OBD2 compliant vehicles.

Read and clear engine fault codesMonitor real-time sensor dataTurn off check engine light
🔧 Utilities
(4.9K)
free with in-app purchases
16
Battery Monitor BM2
Battery Monitor BM2
Battery Monitor BM2
by ShenzhenDaCheng software co., LTD
Free

Monitor your vehicle's battery in real-time via Bluetooth. Test cranking and charging systems to understand your battery's health. View all data directly on your mobile device.

Real-time voltage monitoringCranking system testingCharging system testing
🔧 Utilities
(52)
free
17
SicuroTrack v2 Monitoring
SicuroTrack v2 Monitoring
SicuroTrack v2 Monitoring
by Sicuro Group LLC
Free

Monitor trackers in real time and view asset status. Receive instant alerts for events like geofence crossings. Use your current location to see your position relative to assets.

Real-time tracker monitoringAsset status overviewAlert notifications
🗺️ Navigation
(1)
free
18
Air Quality App · AQI Visual
Air Quality App · AQI Visual
Air Quality App · AQI Visual
Pollution,Allergy,Pollen,CO2
Free
$1.29 | 100% OFF

Monitor real-time air quality, receive personalized health alerts, and access forecasts to make informed daily choices for better health. Understand pollutant levels and track historical data for your locations.

Real-time AQI monitoringPersonalized health alertsAir quality forecasts
☀️ Weather
(7)
free with in-app purchases
19
Car Scanner ELM OBD2
Car Scanner ELM OBD2
Car Scanner ELM OBD2
The best OBD2 diagnostic tool!
Free

Monitor your car's performance, diagnose engine issues, and view sensor data in real-time. Customize your dashboard with gauges and charts, and reset fault codes. Supports a wide range of vehicles and offers advanced features for specific car brands.

Real-time sensor dataOBD fault code reading and resettingCustomizable dashboard with gauges
🔧 Utilities
(31K)
free with in-app purchases
20
Baby Camera - Baby Monitor
Baby Camera - Baby Monitor
Baby Camera - Baby Monitor
Secure & Simple Baby Monitor
Free

Transform two phones into a private, secure baby monitor. Enjoy fast, reliable audio and video streaming directly on your local network with no cloud storage or hidden fees. Setup is quick and easy, offering peace of mind for parents.

100% Private & Local MonitoringCompletely FreeSimple QR Code Setup
🌟 Lifestyle
(94)
free