# INS vs Opioid Conversion Calculator

The clearest difference is rating: INS at 5.0 against Opioid Conversion Calculator's 3.7. INS also leads on in-app purchases (none vs 3) and iOS requirement (9.0 vs 13.0). Opioid Conversion Calculator's advantage is update cadence (every 2 months vs every 6 months) and ratings volume (17 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Opioid Conversion Calculator sells 3 in-app purchases, starting at $3.99 per month. INS asks for nothing beyond the download.

INS holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Opioid Conversion Calculator has 17 ratings behind it against 1, so its average is the more settled of the two.

INS ships an update every 6 months, Opioid Conversion Calculator every 2 months. The most recent releases landed on June 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | INS | Opioid Conversion Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ins/id1460231905/reviews)** | [3.7 (17 ratings)](https://appshunter.io/ios/app/opioid-conversion-calculator/id6446010375/reviews) |
| Number of ratings | 1 | **17** |
| Positive reviews | — | 37.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 88 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [International Neuromodulation Society](https://appshunter.io/developer/1460231904) | [Ayrial Beall](https://appshunter.io/developer/1735693360) |

## What reviewers say

### INS

[App page](https://appshunter.io/ios/app/ins/id1460231905)

Access all information for the International Neuromodulation Society congresses. View sessions, speaker bios, exhibitor lists, and maps. Create a personalized schedule and stay updated with the latest news.

**Highlights:** Congress information, Session details, Speaker bios, Exhibitor list, Interactive maps, Personalized schedule, Latest news updates

**Features:** macOS Compatibility

**In-app purchases:** none


### Opioid Conversion Calculator

[App page](https://appshunter.io/ios/app/opioid-conversion-calculator/id6446010375)

This medical app simplifies complex opioid conversion tasks for healthcare professionals. It offers extensive drug coverage, a visual safety indicator for dosages, and breakthrough dosing calculations. Available in multiple languages, it ensures accurate and safe pain management.

**Highlights:** Extensive drug coverage, Visual safety indicator, Breakthrough dosing calculations, Formulation conversions, Up-to-date pharmaceutical formulary, Multilingual support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Access | $3.99 | per month |
| Pro Access | $19.99 | per year |
| Lifetime Pro Access | $79.99 | one-time |


## Frequently asked questions

### Is INS free?

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

### Is Opioid Conversion Calculator free?

Opioid Conversion Calculator is free to download, with in-app purchases available.

### Which has better reviews, INS or Opioid Conversion Calculator?

INS is rated higher. INS averages 5.0 out of 5 from 1 ratings, while Opioid Conversion Calculator averages 3.7 from 17 ratings.

### Do INS or Opioid Conversion Calculator have ads?

Neither INS nor Opioid Conversion Calculator shows ads.

### Which is updated more often, INS or Opioid Conversion Calculator?

INS ships an update every 6 months, and Opioid Conversion Calculator every 2 months. Most recently, INS was updated on June 24, 2026 and Opioid Conversion Calculator on September 22, 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.*