Best 2 Monitor Apps

244+ iOS apps curated and reviewed

4.3 avg rating

19 free apps

Updated September 2026

Looking for free 2 monitor apps? 19 of our 244+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top 2 Monitor Apps (September 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	CO2 Monitor 2	Free	—	No	No	May 2026
2	Blood Oxygen \| O2 Monitor app+	Free	4.6★ (424)	No	Yes	Sep 2026
3	SicuroTrack v2 Monitoring	Free	5.0★ (1)	No	No	May 2026
4	Status Monitor	Free	4.7★ (110)	No	Yes	Sep 2026
5	Dog Monitor Buddy & Pet cam	Free	4.1★ (423)	No	Yes	Sep 2026
6	War Monitor for Helldivers 2	Free	4.9★ (9.5K)	No	No	Sep 2026
7	Baby Camera - Baby Monitor	Free	4.3★ (113)	No	Yes	Sep 2026
8	Device Monitor²	Free	4.7★ (9.2K)	No	Yes	Sep 2026

Top Picks for 2 Monitor

#1

CO2 Monitor 2 by himpel

Editor's Choice

0.0(0 ratings)

Free

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#2

Blood Oxygen | O2 Monitor app+ by Yana Shestakova

Saturation Level + Pulse Rate

Strong Contender

4.6(424 ratings)

FreeIn-App Purchases

Blood Oxygen | O2 Monitor app+ screenshot 1

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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.

#3

SicuroTrack v2 Monitoring by Sicuro Group LLC

Worth Considering

🗺️ Navigation

5.0(1 ratings)

Free

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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.

More 2 Monitor apps to explore

Device,Activity,CPU,Usage info

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

free with in-app purchases

Dog Monitor Buddy & Pet cam

Dog Monitor Buddy & Pet cam

Dog Monitor Buddy & Pet cam

Puppy Sitting & Bark Control

Transform your old smartphones into a live pet monitoring system. Watch, listen, and talk to your pets from anywhere with motion and noise detection alerts. Ideal for ensuring your pet's well-being when you're away.

Live video and audio streamingTwo-way audio communicationMotion and noise detection

free with in-app purchases

War Monitor for Helldivers 2

War Monitor for Helldivers 2

War Monitor for Helldivers 2

Featuring STRATAGEM HERO!

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

Baby Camera - Baby Monitor

Baby Camera - Baby Monitor

Baby Camera - Baby Monitor

Secure & Simple Baby Monitor

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

Device Monitor²

Device Monitor²

Device Monitor²

System activity info

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.

Detailed device informationSensor access and privacy controlCustomizable widgets

🛠️ Developer Tools

free with in-app purchases

Annie Baby Monitor: Nanny Cam

Annie Baby Monitor: Nanny Cam

Annie Baby Monitor: Nanny Cam

Baby Video Camera - WiFi Cloud

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.

HD video and audio monitoringCry and motion detection alertsUnlimited range via Wi-Fi/mobile data

free with in-app purchases

Battery Monitor BM2

Battery Monitor BM2

Battery Monitor BM2

by Shenzhen Leagend Optoelectronics Co., Ltd.

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

by IN2CORE s.r.o.

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

BlueDriver OBD2 Scan Tool

BlueDriver OBD2 Scan Tool

BlueDriver OBD2 Scan Tool

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.

Read and clear trouble codes (Check Engine, ABS, etc.)Generate professional-grade Repair ReportsAccess Mode 6 and smog readiness data

📊 Productivity

free with in-app purchases

Baby Monitor Nancy: Cloud Cam

Baby Monitor Nancy: Cloud Cam

Baby Monitor Nancy: Cloud Cam

Nanny Video Babysitting Camera

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

free with in-app purchases

Baby Monitor: Video Nanny Cam

Baby Monitor: Video Nanny Cam

Baby Monitor: Video Nanny Cam

for E, 3G, 5G, LTE, 5G & WiFi

Transform old phones into reliable baby monitors. This app allows parents to watch their sleeping baby from anywhere, receiving alerts for noise and low battery. It offers a cost-effective alternative to traditional baby cams.

Turn old phone into Child UnitUse new phone as Parent UnitUnlimited Parent Units

free with in-app purchases

HOME Security Camera & Monitor

HOME Security Camera & Monitor

HOME Security Camera & Monitor

ip cam viewer and surveillance

Transform two devices into a powerful anti-thief system for your home. Monitor your space remotely with live video and high-quality audio, ensuring security and peace of mind from anywhere.

Live video monitoringHigh-quality audio streamingSecure encrypted communication

free with in-app purchases

Oximeter - Track Oxygen SpO2

Oximeter - Track Oxygen SpO2

Oximeter - Track Oxygen SpO2

Blood O2 Monitor Tracker

Monitor and record your blood oxygen saturation (SpO2) levels with this personal health tracking app. It offers detailed analytics, daily wellness guides, and data export options. Sync your health data with Apple Health for a comprehensive overview.

Display, record, and view SpO2 dataDetailed analytics with data spikesNutrition and meditation guides

💪 Health & Fitness

free with in-app purchases

Accountable2You Monitoring

Accountable2You Monitoring

Accountable2You Monitoring

Monitoring & Accountability

This app monitors browsing and app usage on your device, providing detailed reports to accountability partners. It allows for transparent sharing of digital activity without restricting access to websites or apps, fostering integrity and accountability.

Monitors browsing activityTracks app usageShares real-time reports

free with in-app purchases

Baby Monitor Nani: Nanny Cam

Baby Monitor Nani: Nanny Cam

Baby Monitor Nani: Nanny Cam

Video Babyphone for 2 Phones

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

Monitor for 2Miners Pool

Monitor for 2Miners Pool

Monitor for 2Miners Pool

Mining Monitor for 2Miners

Track your cryptocurrency mining progress and statistics for 2Miners Pools. View hashrate, balances, payouts, and worker performance across various supported coins. Get detailed charts and historical data for your mining operations.

Mining progress and statisticsSolo and Pool supportHashrate and balance tracking

free with in-app purchases

NS2 AIR MONITORS

NS2 AIR MONITORS

NS2 AIR MONITORS

by Hansong(Nanjing) Technology Ltd.

This app facilitates the setup and management of NS2 v2 wireless speakers. It guides users through Wi-Fi connection for wireless music streaming and allows for speaker management, renaming, and firmware updates.

Wi-Fi network connectionWireless music streamingSpeaker management

FAQ about 2 Monitor

Are there free 2 monitor apps for iPhone?

Yes — 19 of the top 2 monitor apps we rank are free to download, including CO2 Monitor 2 and Blood Oxygen | O2 Monitor app+.

Does CO2 Monitor 2 have ads or in-app purchases?

CO2 Monitor 2 has no ads and has no in-app purchases, according to its App Store listing as of September 2026.

How many 2 monitor apps are on the App Store?

We track 244+ 2 monitor apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.