Comparison

Flatliner vs cardiBlue

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

Head to head
About

Flatliner

This app allows medical professionals to meticulously log critical interventions during CPR events in real time. It generates organized summaries for immediate review and professional documentation, aiding in efficient patient care.

Highlights
  • Real-time CPR event logging
  • CPR code and compression timers
  • Medication, rhythm, and shock tracking
  • Epinephrine and pulse check reminders
  • Chest compression fraction calculator
  • Built-in metronome
  • Clean CPR summaries
Features
Read full description

Flatliner helps trained emergency physicians, nurses, and paramedics record CPR and code blue events and prepare documentation. Record medications, rhythms, shocks, pulse checks, procedures, and key timestamps during a resuscitation. Review the event timeline afterward, generate a CPR summary, then review, edit, copy, or share the text for documentation. Choose the session mode that fits your workflow: • Standard tracks compressions and chest compression fraction (CCF). • Separate timers provides a separate timer layout. • Logging only focuses on event recording without tracking compressions or CCF. Configure voice, notification, and haptic reminders. Adjust cycle and epinephrine voice volumes separately, try reminder previews, and enable optional antiarrhythmic medication alerts. Notification previews stay separate from a live session. Other features include CPR and compression timers, a metronome, a CCF calculator, code history, and light and dark mode. Review generated notes against the clinical record before use.

About

cardiBlue

This hands-free medical aid assists trained professionals during critical events by timing CPR cycles and medication intervals. It allows for voice-driven logging of events like rhythms, shocks, and medications, creating a timestamped record for easy charting. The app provides spoken prompts and an on-screen summary, with options for PDF export and AI-generated charting narratives.

Highlights
  • Hands-free voice logging
  • CPR cycle timer with prompts
  • Epinephrine interval timer
  • Timestamped event log
  • PDF export of timeline
  • AI-generated charting narrative
Features
Read full description

Run the code. cardiBlue keeps the record. cardiBlue is a documentation and timing aid for trained medical professionals. It is not a medical device, does not provide clinical guidance or decision support, and is not a substitute for professional judgment. In an emergency, follow your institution's protocols and activate your code team. cardiBlue is a hands-free code blue timer built for nurses and code teams. Say "start code" and it listens: log rhythms, shocks, and medications by voice while it runs your CPR cycle timer and epinephrine interval with spoken prompts — your hands never leave the patient. VOICE-DRIVEN LOGGING • "Rhythm is V-fib" — "Shock delivered" — "Epinephrine given" • Timestamped event log built as you speak • Voice undo for corrections, kept transparently in the record • Works face-up on the crash cart, no tapping required TIMERS THAT SPEAK UP • 2:00 CPR cycle timer with spoken cycle prompts • Epinephrine timer (3–5 min, configurable) with due reminders • Haptic confirmations for loud rooms; full silent mode available THE RECORD, READY FOR CHARTING • On-screen summary the moment the code ends — free, always • PDF export of the complete timeline (Pro or single purchase) • AI-written charting narrative generated from your event log • Multi-arrest breakdowns: ROSC, re-arrest, per-arrest stats • Corrected entries shown transparently, never hidden SIMPLE PRICING The live timer, voice commands, and on-screen summary are free forever. Your first PDF export is free. After that: subscribe for unlimited exports and your full code history, or buy a single report — no subscription required. PRIVATE BY DESIGN No accounts. No sign-up. No patient information — ever. cardiBlue logs event types and times only, stored on your device. cardiBlue records what you tell it and times intervals. It does not diagnose, recommend treatment, or provide ACLS guidance. It is a training and documentation aid, not a medical device. Always follow your institution's protocols and use your own clinical judgment. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flatliner4 screens
cardiBlue4 screens

Verdict

The call

The clearest difference is update cadence: cardiBlue at every 2 days against Flatliner's monthly. On price, ads, in-app purchases and monetization model 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. Flatliner sells 1 one-off in-app purchase and cardiBlue sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flatliner ships an update monthly, cardiBlue every 2 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 8 level
Flatliner versus cardiBlue: the parameters behind the verdict, then further details
ParameterFlatlinercardiBlue
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size55 MB29 MB
Age rating17+12+
DeveloperFaisal BaabbadVirtugenic, LLC

Customer experience

Flatliner

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

cardiBlue

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

In-app purchases

1 purchases

Flatliner

One-time1
  • Flatliner Pro Unlock$9.99
3 purchases

cardiBlue

Subscriptions2
  • cardiBlue Pro — Monthly7 Days trial$5.991 Month
  • cardiBlue Pro — Yearly7 Days trial$44.991 Year
One-time1
  • Single Report$2.99

Questions

Is Flatliner free?
Flatliner is free to download, with in-app purchases available.
Is cardiBlue free?
cardiBlue is free to download, with in-app purchases available.
Do Flatliner or cardiBlue have ads?
Neither Flatliner nor cardiBlue shows ads.
Which is updated more often, Flatliner or cardiBlue?
Flatliner ships an update monthly, and cardiBlue every 2 days. Most recently, Flatliner was updated on October 30, 2026 and cardiBlue on October 31, 2026.

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