Comparison

GIR Calc vs Red Book®

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

Head to head
About

GIR Calc

Calculate the Glucose Infusion Rate (GIR) for single or multiple IV drips. This tool is designed for medical professionals, particularly those in pediatrics or neonatal ICUs, to quickly determine essential fluid and sugar infusion rates.

Highlights
  • Calculate GIR for single or multiple IV drips
  • Input weight in kg
  • Input sugar percentage and volume (ml/hr)
  • Handles non-sugar containing fluids
  • Simple calculation button
Features
Read full description

-Up to eight simultaneous drips -Live results, rounded to two decimal places -Dextrose presets for D5, D10, D12.5, D15, D20, and D25 -Solve for rate: pick a target GIR and concentration and get the mL/hr, with the option to account for drips already running -Light and dark themes, eight accent colors, fourteen font choices, and adjustable text size -No account, no ads, no data collection. Everything stays on your device. Formulas GIR (mg/kg/min) = Σ (% dextrose × mL/hr) ÷ (6 × weight in kg) Total fluids (mL/kg/day) = Σ mL/hr × 24 ÷ weight in kg Glucose Infusion Rate is a calculation aid for licensed healthcare professionals and does not replace clinical judgment, institutional protocols, or verification of orders.

About

Red Book®

This app provides the latest information on pediatric infectious diseases from the American Academy of Pediatrics. It includes immunization schedules, vaccine status, influenza resources, and new chapters on COVID-19 and Mpox. Features like note-taking and enhanced search aid quick access to essential medical data.

Highlights
  • Immunization schedules
  • Vaccine status table
  • Influenza resources
  • COVID-19 and Mpox chapters
  • Note-taking and highlighting
  • Enhanced search functionality
Features
Read full description

** The Red Book is the foundational resource on pediatric infectious disease** Featuring content from the latest edition, the Red Book: 2024–2027 Report of the Committee on Infectious Diseases from the American Academy of Pediatrics (AAP) provides the most up-to-date information on a wide variety of infectious diseases that physicians encounter in children. Written and edited by leading experts in the field, along with contributions from the CDC, the FDA, and hundreds of other professionals, this resource stands as the most authoritative and comprehensive available. The Red Book features: * Immunization Schedules - Recommended immunization and catch-up schedules for infants, children, adolescents, and young adults. * Vaccine Status Table - Current information about recently submitted, licensed, and recommended vaccines and biologics, including status of the FDA licensure process and related AAP/CDC recommendations. * Influenza Resources - A comprehensive collection of information on influenza, serving as a centralized reference for vaccine guidance, prevention, treatment, payment policies, news, and other relevant details for infants, children, adolescents, and young adults. * Standardized approaches to disease prevention through immunizations, antimicrobial prophylaxis, and infection-control practices have been updated throughout the Red Book. * Two new chapters on Covid-19 and Mpox have been added. * The System-Based Treatment Table has been reordered so that the grouped recommendations by body system are more easily and quickly accessed. * Greatly expanded tables, figures and algorithms enable quick access to essential information. * The Breastfeeding and Human Milk chapter was updated to align with information from the latest AAP policy statement on breastfeeding. * The listing of Codes for Commonly Administered Pediatric Vaccines, Toxoids, and Immune Globulins has been expanded. * Reference to evidence-based policy recommendations have been updated throughout the Red Book. Unbound Medicine Features: * Highlighting and note-taking within entries * “Favorites” for bookmarking important topics * Enhanced Search to find topics quickly * Prime PubMed links to the primary literature Author: Committee on Infectious Diseases Publisher: American Academy of Pediatrics Editor: David W. Kimberlin, MD, FAAP; Associate Editors: Ritu Banerjee, MD, PhD, FAAP, Elizabeth D. Barnett, MD, FAAP; Ruth Lynfield, MD, FAAP; and Mark H. Sawyer, MD, FAAP Powered By: Unbound Medicine Unbound Medicine Privacy Policy: https://www.unboundmedicine.com/privacy Unbound Medicine Terms of Use: https://www.unboundmedicine.com/end_user_license_agreement

Screenshots

GIR Calc2 screens
Red Book®4 screens

Verdict

The call

GIR Calc and Red Book® both sit at 4.8 stars, but that hides the real split: 100% of GIR Calc's written reviews are positive against 0% of Red Book®'s. GIR Calc also leads on in-app purchases (none vs 2) and update cadence (every 4 months vs every 11 months). Red Book®'s advantage is ratings volume (71 vs 5) and device support (4 vs 2). On price, rating 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

Both are free to download. Red Book® sells 2 one-off in-app purchases. GIR Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for GIR Calc against 4.8 for Red Book®. That said, the two scores are not equally well evidenced: Red Book® has 71 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 100% of GIR Calc's written reviews are positive against 0% of Red Book®'s.

UpkeepUpdate frequency

GIR Calc ships an update every 4 months, Red Book® every 11 months. The most recent releases landed on October 3, 2026 and October 22, 2026 respectively.

Scorecard7 real differences · 3 level
GIR Calc versus Red Book®: the parameters behind the verdict, then further details
ParameterGIR CalcRed Book®
PriceFreeFree
Rating4.8 (5 ratings) — better4.8 (71 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings571 — better
Update frequencyEvery 4 months — betterEvery 11 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS26.015.0 — better
Further details — not scored
Size3 MB9 MB
Age rating4+17+
DeveloperAtlas Software Solutions LLCUnbound Medicine, Inc.

Customer experience

GIR Calc

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Red Book®

All ratings67 ratings
Positive94.0%
Neutral1.5%
Negative4.5%
Written reviews3 reviews
Positive0.0%
Neutral66.7%
Negative33.3%

In-app purchases

None

GIR Calc

No in-app purchases

2 purchases

Red Book®

One-time2
  • Red Book 32e$99.99
  • Red Book$99.99

Questions

Is GIR Calc free?
GIR Calc is free to download, with no in-app purchases.
Is Red Book® free?
Red Book® is free to download, with in-app purchases available.
Which has better reviews, GIR Calc or Red Book®?
GIR Calc is rated higher. GIR Calc averages 4.8 out of 5 from 5 ratings, while Red Book® averages 4.8 from 71 ratings.
Do GIR Calc or Red Book® have ads?
Neither GIR Calc nor Red Book® shows ads.
Which is updated more often, GIR Calc or Red Book®?
GIR Calc ships an update every 4 months, and Red Book® every 11 months. Most recently, GIR Calc was updated on October 3, 2026 and Red Book® on October 22, 2026.

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