NICU Fluids vs UmbiCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NICU Fluids
This medical calculator helps healthcare professionals quickly and accurately compute IV fluid rates, glucose infusion rates, and electrolyte levels for neonates. It's designed for nurses, students, and physicians caring for critically ill infants.
- GIR calculator (single or multiple drips)
- Electrolyte calculator (single or multiple drips)
- FENa calculator
- Accurate calculations for neonates
- Developed by a neonatal-perinatal fellow
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NICU Fluids is a fast, clean set of calculators for clinicians managing intravenous fluids in neonates and children. Three tools, one tap apart. Electrolytes Enter the patient's weight, then add each drip with its dextrose, rate, NaCl, NaAcetate, and K. Results update as you type: GIR in mg/kg/min, total fluids in mL/kg/day, and sodium, chloride, acetate, and potassium in mEq/kg/day. Turn on calcium and magnesium for two more columns with gluconate and sulfate equivalents. Presets follow whichever field you're in, so NS, ½NS, ¼NS, and the acetate strengths are one tap away. Start with a single drip and add up to six. GIR A dedicated glucose infusion rate screen for when that's all you need. Up to eight drips, dextrose presets, and a solver that takes a target GIR and concentration and gives you the mL/hr, with the option to account for drips already running. FENa Enter serum and urine sodium and creatinine to get fractional excretion of sodium, with a plain-language interpretation. Switch between neonate and child/adult thresholds, since term neonates run higher at baseline, and see a reminder about diuretics and preterm variability. Also included -Results rounded to two decimal places, shown in blue so nothing reads as an abnormal flag -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 Electrolyte (mEq/kg/day) = mEq/L × mL/hr × 24 ÷ 1000 ÷ weight in kg FENa (%) = (UNa × PCr) ÷ (PNa × UCr) × 100 NICU Fluids is a calculation aid for licensed healthcare professionals and does not replace clinical judgment, institutional protocols, or verification of orders.
UmbiCalc
This medical app estimates umbilical catheter insertion lengths for neonates based on birth weight. It utilizes an algorithm derived from statistical modeling and is intended for educational use by healthcare professionals. Always consult a medical provider for health advice.
- Umbilical arterial catheter estimation
- Umbilical venous catheter estimation
- Birth weight-based calculations
- Based on published algorithm
- For educational purposes
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This app provides the birth weight-based insertion length estimations for umbilical arterial and venous catheters placed in neonates in the Neonatal Intensive Care Unit. UmbiCalc is based on the algorithm described by Tambasco et al. in “A Novel and Accurate Method for Estimating Umbilical Arterial and Venous Catheter Insertion Length.” Journal of Perinatology 2021. The algorithm was derived from statistical modeling using a representative sample of the current NICU population and validated across a wide range of birth weights. Intended for use by neonatologists, pediatricians, and advanced practice providers for personal educational purposes only. It is not intended for use in clinical practice or the delivery of medical care. Always consult with a healthcare provider for advice concerning your health.
Screenshots
Verdict
The clearest difference is rating: UmbiCalc at 5.0 against NICU Fluids's 4.3. UmbiCalc also leads on update cadence (every 12 months vs every 158 months) and iOS requirement (12.0 vs 26.0). On price, review sentiment, ratings volume 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
UmbiCalc holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
NICU Fluids ships an update every 158 months, UmbiCalc every 12 months. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.
| Parameter | NICU Fluids | UmbiCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (7 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 7 — better | 4 |
| Update frequency | Every 158 months | Every 12 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Atlas Software Solutions LLC | Yale |
Customer experience
NICU Fluids
UmbiCalc
In-app purchases
NICU Fluids
No in-app purchases
UmbiCalc
No in-app purchases







