Comparison

Blood pH vs EMS Pathfinder

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

Head to head
About

Blood pH

This medical app helps healthcare professionals quickly diagnose acid-base disorders in patients. It visualizes patient data on an interactive graph and offers tools to calculate Anion Gap and A-a Difference for better characterization of disturbances. Users can store and track patient evolutions graphically and share reports as PDFs.

Highlights
  • Interactive color graph for acid-base disorders
  • Graphical tracking of patient evolution
  • Anion Gap and A-a Difference calculators
  • Store and compare previous disturbances
  • Share graphs as PDF reports
  • Support for mmHg or KPa pressure units
Features
Read full description

With Blood pH, you can quickly determine the acid-base disorders of your patient, follow their evolution graphically, and see whether it’s adequately compensating for them. If it is not, Blood pH will also report the disturbance that’s preventing this. All this information is inserted visually, in a beautiful interactive graph, in order to let you better understand what’s happening. When appropriate, Blood pH also lets you calculate the Anion Gap or the A-a Difference, to obtain a better characterization of the source of the disturbance. Features: - Interactive color graph where you can plot, with a touch of the screen, your patient’s disturbance and see the relationship between pH, PaCO2, HCO3 and Standard Base Excess. - Choose between the physiological model (HCO3) or Standard Base Excess for plotting and calculate the disturbance. - Store previous disturbances and plot them on the screen to follow their evolution - Grayscale version of the graph, with increased contrast between elements - Share the color or grayscale graph as a PDF - Context sensitive Anion Gap and A-A Difference calculators to better characterize the disturbance - Insert pressures as mmHg or KPa - The A-a Difference calculator can use your current atmospheric pressure to improve its accuracy - Universal App with iPad and iPhone support

About

EMS Pathfinder

Access free, offline EMS protocols, drug references, and clinical tools tailored for mobile use. Features include interactive flowcharts, AI-powered search, and customizable tools for field professionals. Updates are free and automatic when online.

Highlights
  • Offline access to EMS protocols
  • Mobile-optimized protocol layouts
  • Interactive flowcharts
  • AI-enhanced search
  • Medication and dosing calculator
  • Pediatric length-based reference
  • CPR and incident timers
Features
Read full description

Free statewide and regional EMS protocols, with a drug reference and clinical tools, in one app that works without signal. No subscription, and protocol updates are free. Every protocol is rebuilt for your phone screen, so there's no pinching and zooming around a printed page or PDF. Pick your state, region or agency once and everything downloads to your device, ready for the basement, the back road or the dead zone. Updates arrive on their own the next time you're online. PROTOCOLS BUILT FOR YOUR PHONE • Native mobile layouts, color-coded by provider level • Enter your patient's details once and every dose in the protocol is worked out for them • Tap any medication, tool or linked protocol to jump straight to it • Step through interactive flowcharts one decision at a time • AI-enhanced search that understands what you mean, even offline • Favorites for the protocols, meds and tools you reach for most MEDICATIONS AND DOSING • Searchable drug reference with indications, contraindications, mechanism and dosing • Cross-linked both ways: open a drug from any protocol, or see every protocol that uses it • Dose, volume, infusion and gravity drip calculators built from your protocols • Weight in lb or kg, or ideal body weight from height • Clinically rounded results, with maximum-dose and patient-age checks CLINICAL TOOLS • Pediatric length-based reference: weights, doses and defibrillation energies by zone • Burn calculator with TBSA and Parkland fluid rates • Stroke scales (Cincinnati/FAST, BE-FAST, RACE, LAMS, VAN, FAST-ED), plus GCS, APGAR, Sgarbossa and COWS • Tidal volume, shock index, pediatric ET tube size, oxygen tank duration and common home meds • Hospital Finder with capability filters (in select states) • CPR and incident timers with event logs, with incident times in a Live Activity on your Lock Screen • Home Screen widget that opens your favorite tools in one tap BUILT FOR THE FIELD • Fully offline once downloaded, with no hunting for signal • Keep several states or agencies on your phone at once • Adjustable text size and dark mode • No ads, and no account needed for public protocols FREE PUBLIC PROTOCOLS Statewide and regional sets from across the US, plus the NASEMSO National Model EMS Clinical Guidelines, and we add new sets regularly. Open the app to see every set; no account needed. Don't see yours? Request it in the app or at emspathfinderapp.com. FOR EMS AGENCIES Give every crew member your own protocols, medications, dosing, tools, contacts, documents and forms, updated live from a web editor. You control who sees what: members get in with an account, single sign-on or an access code. Agencies can also add barcode medication administration (BCMA) scanning. Learn more at emspathfinderapp.com. A NOTE ON SAFETY EMS Pathfinder is a reference and educational tool. It does not replace medical direction, your agency's guidelines or your clinical judgment. Always check the concentration on the packaging and confirm doses against local protocol before you give them. Each public protocol set shows its source and when we last updated it. Confirm with your state or regional EMS authority and your medical director. Questions or feedback? Tap Support in the app or visit emspathfinderapp.com.

Screenshots

Blood pH4 screens
EMS Pathfinder4 screens

Verdict

The call

The clearest difference is price: EMS Pathfinder at Free against Blood pH's $1.99. EMS Pathfinder also leads on iOS requirement (16.4 vs 26). Blood pH's advantage is ratings volume (28 vs 6). On rating, review sentiment, update cadence and ads 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

EMS Pathfinder is free to download; Blood pH costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Blood pH against 5.0 for EMS Pathfinder. Both are backed by a comparable volume of ratings — 28 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Blood pH ships an update every 2 months, EMS Pathfinder every 3 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Blood pH versus EMS Pathfinder: the parameters behind the verdict, then further details
ParameterBlood pHEMS Pathfinder
Price$1.99Free — better
Rating5.0 (28 ratings)5.0 (6 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings28 — better6
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS2616.4 — better
Further details — not scored
Size7 MB147 MB
Age rating12+17+
DeveloperRemarkable Edge, LdaFullCode LLC

Customer experience

Blood pH

All ratings28 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

EMS Pathfinder

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Blood pH

No in-app purchases

None

EMS Pathfinder

No in-app purchases

Questions

Is Blood pH free?
Blood pH costs $1.99, with no in-app purchases.
Is EMS Pathfinder free?
EMS Pathfinder is free to download, with no in-app purchases.
Which has better reviews, Blood pH or EMS Pathfinder?
EMS Pathfinder is rated higher. Blood pH averages 5.0 out of 5 from 28 ratings, while EMS Pathfinder averages 5.0 from 6 ratings.
Do Blood pH or EMS Pathfinder have ads?
Neither Blood pH nor EMS Pathfinder shows ads.
Which is updated more often, Blood pH or EMS Pathfinder?
Blood pH ships an update every 2 months, and EMS Pathfinder every 3 months. Most recently, Blood pH was updated on November 6, 2026 and EMS Pathfinder on October 30, 2026.

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