# Nject vs MD Codes

The clearest difference is price: MD Codes at Free against Nject's $4.99. MD Codes also leads on iOS requirement (13.0 vs 15.1). Nject's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 8 months). On in-app purchases and device support there is nothing between them.

MD Codes is free to download; Nject costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Nject ships an update every 6 weeks, MD Codes every 8 months. The most recent releases landed on September 23, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Nject | MD Codes |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.0 (126 ratings)](https://appshunter.io/ios/app/nject/id1620565745/reviews)** | — |
| Number of ratings | **126** | — |
| Positive reviews | 57.4% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 8 months |
| Monetization | Free | — |
| Best chart rank | **#9** | — |
| Size | 68 MB | 41 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Keaton Benning, LLC](https://appshunter.io/developer/1692217678) | [CLINICA MEDICA DR MAURICIO DE MAIO LTDA](https://appshunter.io/developer/1798256849) |

## What reviewers say

### Nject

[App page](https://appshunter.io/ios/app/nject/id1620565745)

**Currently charting:** #9 Top Paid · Medical (US App Store)

This app serves as a comprehensive resource for aesthetic professionals. It offers tools for dilution calculations, facilitates partnerships, and provides a live forum with experts. Users can also find assistance with vascular occlusion and access other valuable information.

**Highlights:** Dilution Calculators, Partnership Facilitation, Live Expert Forum, Vascular Occlusion Help

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 User-friendly and simple interface
- 🎯 Accurate dosing calculations for toxin injections
- 📱 Visual syringe markings aid learning
- 🚀 Quick and efficient dosage conversions
- 💬 Responsive developer addressing user feedback

**What reviewers complain about**

- 🐛 App crashes when selecting syringes
- 🐛 Syringe dropdown menu shows 'no data' or won't populate
- 🐛 Screen doesn't scroll to access calculate button
- 🐛 Force closing on multiple devices
- ❌ Limited syringe options available

**Reported bugs**

- App crashes when selecting syringe option
- Syringe dropdown menu fails to load options
- Screen doesn't scroll to reveal calculate button after data entry
- Force closing on both iOS and Android devices
- Stuck on single medication screen (Semaglutide) with no navigation

**Requested features**

- Add Comfortox 0.5mL syringe option
- Add TB (tuberculin) syringe options
- Add allergen/product selection dropdown (Botox, Dysport, Azzalure, etc.)
- Visual indicator showing exact pull location on syringe for specific units
- Support for mg/mL dosing (for Semaglutide, tirzepatide, compounded medications)


### MD Codes

[App page](https://appshunter.io/ios/app/md-codes/id6744648631)

**In-app purchases:** none


## Frequently asked questions

### Is Nject free?

Nject costs $4.99, with no in-app purchases.

### Is MD Codes free?

MD Codes is free to download, with no in-app purchases.

### Do Nject or MD Codes have ads?

MD Codes shows ads; Nject does not.

### Which is updated more often, Nject or MD Codes?

Nject ships an update every 6 weeks, and MD Codes every 8 months. Most recently, Nject was updated on September 23, 2026 and MD Codes on September 12, 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.*