O2 Buddy Downloads & RevenueO2 Buddy: Blood Oxygen SpO2 · App Store
Not in any tracked top chart right now.
Updated 5 Nov 2026 · rankings refresh through the day
DeveloperMinorbits LLC
CategoryHealth & Fitness
Price0.99 USD
Released
Rating★ 4.7 (125)
Version2.1.1
Age rating12+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)1k+ worldwide
O2 Buddy: Blood Oxygen SpO2 update history & changes
Last change · 26 events since 29 Aug 2025Full timeline ↓📦Updated to version 2.1.1📦Updated to version 2.1📈Dropped out of every chart we track✏️Description updated💰Now free✏️New screenshots💰Now free📈Charting in a new country🆕First spotted by AppInsider🆕Its developer released another app: Wristmate
Full timeline · 26 events
- 📦O2 Buddy: Blood Oxygen SpO2 updated to version 2.1.1• Background App Refresh: O₂ Buddy now appears under Settings → General → Background App Refresh, so iOS can wake the app for new readings while it's closed. A new onboarding step and a one-time reminder help you turn it on.
• Keep Readings Flowing guide: clearer steps for the Shortcuts automation, including the Apple Intelligence screen and what to search for.
• Settings shows a warning when Background App Refresh is off.
• Smaller widget extension.… more - 📦O2 Buddy: Blood Oxygen SpO2 updated to version 2.1• Made for iPhone Duo: unfold it and turn it sideways to see two columns side by side on Home, Trends, reading details and Settings. When it’s partly folded, the columns move apart so nothing sits in the crease.
• Unlocking O₂ Buddy Pro now takes you straight back to your readings instead of leaving the purchase screen open.
• Readings sync more reliably when your iPhone wakes O₂ Buddy while it’s locked.
• Updated “Keep Readings Flowing” steps for the new Shortcuts app in iOS 27.… more - 📈O2 Buddy: Blood Oxygen SpO2 dropped out of every chart we trackLast seen 21 Oct
- ✏️O2 Buddy: Blood Oxygen SpO2: description updated· US, GB
- 💰O2 Buddy: Blood Oxygen SpO2: now freeFree (was 0.99 USD) · US
- ✏️O2 Buddy: Blood Oxygen SpO2: new screenshots2 screenshots (was 2) · US, GB
- 💰O2 Buddy: Blood Oxygen SpO2: now freeFree (was 0.99 GBP) · GB
- ✏️O2 Buddy: Blood Oxygen SpO2: app got bigger7 MB → 9 MB (+16%)
- 📦O2 Buddy: Blood Oxygen SpO2 updated to version 2.0NEW HOME
• Your latest reading, a Last Night summary, and today at a glance.
• Readings are now grouped as Typical, Lower, or Low.
SMARTER TRENDS
• Day vs Night now follows your sleep: if you track sleep in Health, "night" means asleep, and each night is counted on the morning it ends instead of being split at midnight.
• Insights: time in range, your pattern by hour of day, and your lowest readings.
• Heart rate and breathing rate around each reading, so you can see what was happening at the time.
SHARE WITH YOUR DOCTOR
• Export a PDF report or a spreadsheet of up to 90 days of readings.
APPLE WATCH
• A new paged Watch app: your latest reading, then a 7-day trend with daily ranges.
• Your last 100 readings on the wrist.
• Complications stay current and no longer go blank.
LOW READING NOTICES
• Readings that arrive together after you unlock your iPhone become one summary, with the time each was taken.
• Fresh low readings can now break through Focus modes.
FIXES
• Widgets update in the background again.
• Fewer duplicate syncs to the Watch.
O₂ BUDDY PRO
Trends, Watch history, vitals, insights, and export are part of Pro — a one-time purchase, not a subscription. If you bought O₂ Buddy before 2.0, everything you had stays free, and the new 2.0 additions are available at a reduced founder price. Thank you for supporting a one-person app.
Not a medical device. O₂ Buddy displays readings recorded by Apple Watch and is not intended to diagnose or treat any condition.… more - 📈O2 Buddy: Blood Oxygen SpO2 charting in a new countryPhilippines
- 📈O2 Buddy: Blood Oxygen SpO2 entered the top 100Top Paid · Health & Fitness · CA
- 📈O2 Buddy: Blood Oxygen SpO2 charting in a new countryCanada
- 📈O2 Buddy: Blood Oxygen SpO2 charting in a new countryMalaysia
- 📈O2 Buddy: Blood Oxygen SpO2 entered the top 10Top Paid · Health & Fitness · TR
- 📈O2 Buddy: Blood Oxygen SpO2 charting in a new countryTurkey
- 📈O2 Buddy: Blood Oxygen SpO2 entered the top 100Top Paid · Health & Fitness · TW
- 📈O2 Buddy: Blood Oxygen SpO2 charting in a new countryTaiwan
- 📈O2 Buddy: Blood Oxygen SpO2 entered the top 100Top Paid · Health & Fitness · AU
- 📈O2 Buddy: Blood Oxygen SpO2 charting in a new countryAustralia
- 📈O2 Buddy: Blood Oxygen SpO2 entered the top 10Top Paid · Health & Fitness · SE
- 📈O2 Buddy: Blood Oxygen SpO2 entered the top 100Top Paid · Health & Fitness · NL
- 📈O2 Buddy: Blood Oxygen SpO2 charting in a new country in 2 chartsNetherlands · Sweden
- 🆕O2 Buddy: Blood Oxygen SpO2 first spotted by AppInsider#24 in Top Paid · Health & Fitness · United States
- 📦O2 Buddy: Blood Oxygen SpO2 version 1.5No release notes
- 🆕O2 Buddy: Blood Oxygen SpO2: its developer released another app: Wristmate
- 🆕O2 Buddy: Blood Oxygen SpO2 released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.7 ★
125 ratings
Measured
O2 Buddy: Blood Oxygen SpO2 on the App Store
App details
App ID
6751239297
Publisher
Minorbits LLC
On the store since
Aug 2025
1 year on the store
Minimum OS
iOS 18.0+
iPhone XS and later
Devices
iPhone · iPad · Watch
Content rating
12+
Languages
1
EN
Size
9 MB
Also listed in
Lifestyle
O2 Buddy: Blood Oxygen SpO2 downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.7 ★
125 ratings
Measured
Ratings
125
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.6★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
45/100
faster than 41% of Health & Fitness apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about O2 Buddy: Blood Oxygen SpO2
From the 20 most recent App Store reviews in the US.
Users highly value the app's ability to restore blood oxygen visibility on the Apple Watch, praising its simplicity and health utility. However, complaints focus on data synchronization delays, lack of historical graphing features, and compatibility issues with specific watch models.
Mixed but leaning positive (70% of recent reviews give 4–5 stars). People like it for being useful, and good value. Recent reviews are more negative than earlier ones.
What people like
- Useful: “It really works great it’s really been improved”
- Price & subscription: “I am especially pleased that the author of this program only charges $0.99 for this app, which makes it affordable for almost everyone”
- Updates: “Confused about O2 updates”
- Ease of use: “Nice and easy to read interface”
About O2 Buddy: Blood Oxygen SpO2
O₂ Buddy makes your blood oxygen readings effortless to see, understand, and track - on your iPhone, your Home Screen, and your wrist.
Your Apple Watch already measures your blood oxygen throughout the day and night. O₂ Buddy turns those readings into something you can actually use.
AT A GLANCE
• Your latest reading, a Last Night summary, and today's average and low on one screen
• Every reading is grouped as Typical, Lower, or Low, so you know where it falls instantly
SEE YOUR TRENDS
• Switch between 24 hours, 7 days, 30 days, and 90 days with a tap
• Every day shows its full range alongside its average, so you see the whole picture - not just the last number
• Watch your average rise or fall compared to the period before
DAY VS NIGHT
• Compare your daytime readings against your overnight ones, side by side
• If you track sleep in Health, "night" means asleep - and each night is counted on the morning it ends, not split at midnight
INSIGHTS
• Time in range: how much of your period was Typical, Lower, or Low
• Your pattern by hour of day, and your lowest readings
EVERY READING IN CONTEXT
• Tap any reading to see where it falls within that day
• See your heart rate from the five minutes before and after, and your breathing rate when it was measured
• Compare it against readings taken around the same time on other days
SHARE WITH YOUR DOCTOR
• Export a clean PDF report or a spreadsheet of up to 90 days of readings
• Reports are created on your iPhone and only leave it if you choose to share them
ON YOUR WRIST
• A fast, glanceable Apple Watch app: your latest reading, then a 7-day trend with daily ranges
• Your last 100 readings on the wrist
• Complications in circular, rectangular, corner, and inline styles - including a color-coded gauge ring and a 7-day trend sparkline
ON YOUR HOME SCREEN
• A widget for your latest reading
• A widget for your 7-day trend
LOW READING NOTICES
• Optional notifications when a reading falls below a threshold you choose
• Readings that arrive together after you unlock your iPhone become one summary, with the time each was taken
PRIVATE BY DESIGN
• Read-only access to Apple Health
• Your data stays on your devices - never uploaded, never shared, never sold
O₂ BUDDY PRO
Readings and today's overview are free. Trends, Day vs Night, low reading notices, the full Watch app and complications, vitals, Insights, and Export are part of O₂ Buddy Pro - a single one-time purchase, not a subscription. If you bought O₂ Buddy before version 2.0, everything you already had stays yours at no cost, and the 2.0 additions are offered at a reduced founder price. An optional tip jar is also available; tips unlock nothing.
Also includes Light, Dark, and Automatic appearance, 12- or 24-hour time, and built-in FAQs and support.
O₂ Buddy is not a medical device and is not intended to diagnose or treat any condition. Blood oxygen measurements are recorded by Apple Watch and stored in the Health app.
Your Apple Watch already measures your blood oxygen throughout the day and night. O₂ Buddy turns those readings into something you can actually use.
AT A GLANCE
• Your latest reading, a Last Night summary, and today's average and low on one screen
• Every reading is grouped as Typical, Lower, or Low, so you know where it falls instantly
SEE YOUR TRENDS
• Switch between 24 hours, 7 days, 30 days, and 90 days with a tap
• Every day shows its full range alongside its average, so you see the whole picture - not just the last number
• Watch your average rise or fall compared to the period before
DAY VS NIGHT
• Compare your daytime readings against your overnight ones, side by side
• If you track sleep in Health, "night" means asleep - and each night is counted on the morning it ends, not split at midnight
INSIGHTS
• Time in range: how much of your period was Typical, Lower, or Low
• Your pattern by hour of day, and your lowest readings
EVERY READING IN CONTEXT
• Tap any reading to see where it falls within that day
• See your heart rate from the five minutes before and after, and your breathing rate when it was measured
• Compare it against readings taken around the same time on other days
SHARE WITH YOUR DOCTOR
• Export a clean PDF report or a spreadsheet of up to 90 days of readings
• Reports are created on your iPhone and only leave it if you choose to share them
ON YOUR WRIST
• A fast, glanceable Apple Watch app: your latest reading, then a 7-day trend with daily ranges
• Your last 100 readings on the wrist
• Complications in circular, rectangular, corner, and inline styles - including a color-coded gauge ring and a 7-day trend sparkline
ON YOUR HOME SCREEN
• A widget for your latest reading
• A widget for your 7-day trend
LOW READING NOTICES
• Optional notifications when a reading falls below a threshold you choose
• Readings that arrive together after you unlock your iPhone become one summary, with the time each was taken
PRIVATE BY DESIGN
• Read-only access to Apple Health
• Your data stays on your devices - never uploaded, never shared, never sold
O₂ BUDDY PRO
Readings and today's overview are free. Trends, Day vs Night, low reading notices, the full Watch app and complications, vitals, Insights, and Export are part of O₂ Buddy Pro - a single one-time purchase, not a subscription. If you bought O₂ Buddy before version 2.0, everything you already had stays yours at no cost, and the 2.0 additions are offered at a reduced founder price. An optional tip jar is also available; tips unlock nothing.
Also includes Light, Dark, and Automatic appearance, 12- or 24-hour time, and built-in FAQs and support.
O₂ Buddy is not a medical device and is not intended to diagnose or treat any condition. Blood oxygen measurements are recorded by Apple Watch and stored in the Health app.
Latest updates
2.1.1
• Background App Refresh: O₂ Buddy now appears under Settings → General → Background App Refresh, so iOS can wake the app for new readings while it's closed. A new onboarding step and a one-time reminder help you turn it on.
• Keep Readings Flowing guide: clearer steps for the Shortcuts automation, including the Apple Intelligence screen and what to search for.
• Settings shows a warning when Background App Refresh is off.
• Smaller widget extension.
2.1
• Made for iPhone Duo: unfold it and turn it sideways to see two columns side by side on Home, Trends, reading details and Settings. When it’s partly folded, the columns move apart so nothing sits in the crease.
• Unlocking O₂ Buddy Pro now takes you straight back to your readings instead of leaving the purchase screen open.
• Readings sync more reliably when your iPhone wakes O₂ Buddy while it’s locked.
• Updated “Keep Readings Flowing” steps for the new Shortcuts app in iOS 27.
2.0
NEW HOME
• Your latest reading, a Last Night summary, and today at a glance.
• Readings are now grouped as Typical, Lower, or Low.
SMARTER TRENDS
• Day vs Night now follows your sleep: if you track sleep in Health, "night" means asleep, and each night is counted on the morning it ends instead of being split at midnight.
• Insights: time in range, your pattern by hour of day, and your lowest readings.
• Heart rate and breathing rate around each reading, so you can see what was happening at the time.
SHARE WITH YOUR DOCTOR
• Export a PDF report or a spreadsheet of up to 90 days of readings.
APPLE WATCH
• A new paged Watch app: your latest reading, then a 7-day trend with daily ranges.
• Your last 100 readings on the wrist.
• Complications stay current and no longer go blank.
LOW READING NOTICES
• Readings that arrive together after you unlock your iPhone become one summary, with the time each was taken.
• Fresh low readings can now break through Focus modes.
FIXES
• Widgets update in the background again.
• Fewer duplicate syncs to the Watch.
O₂ BUDDY PRO
Trends, Watch history, vitals, insights, and export are part of Pro — a one-time purchase, not a subscription. If you bought O₂ Buddy before 2.0, everything you had stays free, and the new 2.0 additions are available at a reduced founder price. Thank you for supporting a one-person app.
Not a medical device. O₂ Buddy displays readings recorded by Apple Watch and is not intended to diagnose or treat any condition.
Store changes
What O2 Buddy: Blood Oxygen SpO2 changed on its store page: name, icon, screenshots, price, size, languages, requirements.
Description updated 
Now free
Free (was 0.99 USD)
New screenshots
2 screenshots (was 2)
