Best 2 Monitor Apps

244+ iOS apps curated and reviewed

4.2 avg rating
19 free apps
Updated October 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 (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1CO2 Monitor 2CO2 Monitor 2Free—NoNoMay 2026
2Blood Oxygen | O2 Monitor app+Blood Oxygen | O2 Monitor app+Free4.6★ (428)NoYesOct 2026
3Blood Oxygen App- WatchBlood Oxygen App- WatchFree4.2★ (703)NoYesOct 2026
4SicuroTrack v2 MonitoringSicuroTrack v2 MonitoringFree5.0★ (1)NoNoMay 2026
5Status MonitorStatus MonitorFree4.7★ (141)NoYesOct 2026
6Blood Oxygen Monitor: SpO2Blood Oxygen Monitor: SpO2Free—NoYesOct 2026
7Device Monitor²Device Monitor²Free4.7★ (9.5K)NoYesNov 2026
8War Monitor for Helldivers 2War Monitor for Helldivers 2Free4.9★ (10K)NoNoNov 2026

Top Picks for 2 Monitor

Blood Oxygen | O2 Monitor app+#2

Blood Oxygen | O2 Monitor app+ by Yana Shestakova

Saturation Level + Pulse Rate
Strong Contender
🏥 Medical
4.6(428 ratings)
FreeIn-App Purchases
Blood Oxygen | O2 Monitor app+ screenshot 1
Blood Oxygen | O2 Monitor app+ screenshot 2
Blood Oxygen | O2 Monitor app+ screenshot 3
Blood Oxygen | O2 Monitor app+ screenshot 4
Blood Oxygen | O2 Monitor app+ screenshot 5

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.

Blood Oxygen App- Watch#3

Blood Oxygen App- Watch by 199 Developments Private Limited

Log & track pulse o2 levels
Worth Considering
🏥 Medical
4.2😐(703 ratings)
FreeIn-App Purchases
Blood Oxygen App- Watch screenshot 1
Blood Oxygen App- Watch screenshot 2
Blood Oxygen App- Watch screenshot 3
Blood Oxygen App- Watch screenshot 4
Blood Oxygen App- Watch screenshot 5
Blood Oxygen App- Watch screenshot 6

Monitor and manage vital health metrics like blood oxygen, heart rate, and blood pressure. Receive automatic alerts for critical changes and utilize breathing exercises for relaxation. Syncs with Apple Health for a comprehensive view of your well-being.

What We Love

  • 🚀 Accurate pulse ox monitoring
  • 👍 Quick and easy to use
  • 🚀 Effortless Apple Watch sync
  • 👍 Intuitive and senior-friendly
  • 👍 Convenient sharing and alerts
  • 👍 More than just a tracker
  • 👍 Surprisingly good

Room to Improve

  • 🐛 Doesn't work on certain watches
  • 🐛 Premium features not working as expected
  • 🐛 Frequent false alarms
  • 💰 Expensive subscription

More 2 Monitor apps to explore

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+.
CO2 Monitor 2 has no ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 244+ 2 monitor apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.