# GIR Calc vs PREP Self

The clearest difference is rating: GIR Calc at 4.8 against PREP Self's 3.7. GIR Calc also leads on review sentiment (100% vs 67%). PREP Self's advantage is update cadence (daily vs every 4 months) and iOS requirement (15.6 vs 26.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GIR Calc holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews point the same way: 100% of GIR Calc's written reviews are positive against 67% of PREP Self's.

GIR Calc ships an update every 4 months, PREP Self daily. The most recent releases landed on September 15, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | GIR Calc | PREP Self |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/gir-calc/id660860969/reviews)** | [3.7 (9 ratings)](https://appshunter.io/ios/app/prep-self-assessments-program/id6756599702/reviews) |
| Number of ratings | 5 | **9** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Daily** |
| Monetization | Free | Free |
| Size | 3 MB | 44 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Wells](https://appshunter.io/developer/657195132) | [American Academy of Pediatrics](https://appshunter.io/developer/409863343) |

## What reviewers say

### GIR Calc

[App page](https://appshunter.io/ios/app/gir-calc/id660860969)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### PREP Self

[App page](https://appshunter.io/ios/app/prep-self-assessments-program/id6756599702)

Access trusted pediatric learning content through a new mobile app. Build a personalized question bank by selecting blocks from various content areas to fit your learning style and schedule. Earn CME credits and MOC points with each block.

**Highlights:** Trusted PREP content, Customizable question bank, Case-based questions, Earn CME credits, Earn MOC points, Modern user interface

**In-app purchases:** none


## Frequently asked questions

### Is GIR Calc free?

GIR Calc is free to download, with no in-app purchases.

### Is PREP Self free?

PREP Self is free to download, with no in-app purchases.

### Which has better reviews, GIR Calc or PREP Self?

GIR Calc is rated higher. GIR Calc averages 4.8 out of 5 from 5 ratings, while PREP Self averages 3.7 from 9 ratings.

### Do GIR Calc or PREP Self have ads?

Neither GIR Calc nor PREP Self shows ads.

### Which is updated more often, GIR Calc or PREP Self?

GIR Calc ships an update every 4 months, and PREP Self daily. Most recently, GIR Calc was updated on September 15, 2026 and PREP Self on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*