# Otnac vs PeriopSim

The clearest difference is update cadence: Otnac at every 3 weeks against PeriopSim's every 5 months. PeriopSim's advantage is rating (3.3 vs 3.0) and iOS requirement (13.0 vs 18.0). 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.

PeriopSim holds the better App Store score, 3.3 against 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Otnac ships an update every 3 weeks, PeriopSim every 5 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Otnac | PeriopSim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/otnac/id417750647/reviews) | **[3.3 (4 ratings)](https://appshunter.io/ios/app/periopsim/id960363034/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free | Free |
| Size | 567 MB | 130 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPad | **iPad, Mac** |
| Age rating | 17+ | 17+ |
| Developer | [Epic](https://appshunter.io/developer/348308666) | [Conquer Experience Inc](https://appshunter.io/developer/1551005418) |

## What reviewers say

### Otnac

[App page](https://appshunter.io/ios/app/otnac/id417750647)

This application allows project team members and system administrators of organizations using Epic Canto to preview upcoming development before it is released to clinicians. Access requires administrator security within an organization that is live on or installing Canto. Clinical users should download the standard Epic Canto app instead.

**Highlights:** Preview upcoming Epic Canto development, For project team members, For system administrators, Requires Epic Canto installation, Administrator security access

**In-app purchases:** none


### PeriopSim

[App page](https://appshunter.io/ios/app/periopsim/id960363034)

This tool allows operating room educators to train nurses and surgical technologists on surgical procedures. It offers safe practice, instrument recognition, and step-by-step preparation for unfamiliar surgeries through interactive video and timed challenges.

**Highlights:** Safe surgical skills practice, Instrument recognition training, Interactive real surgery videos, Step-by-step procedure preparation, Timed skill challenges, Leaderboard scoring

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Otnac free?

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

### Is PeriopSim free?

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

### Which has better reviews, Otnac or PeriopSim?

PeriopSim is rated higher. Otnac averages 3.0 out of 5 from 2 ratings, while PeriopSim averages 3.3 from 4 ratings.

### Do Otnac or PeriopSim have ads?

Neither Otnac nor PeriopSim shows ads.

### Which is updated more often, Otnac or PeriopSim?

Otnac ships an update every 3 weeks, and PeriopSim every 5 months. Most recently, Otnac was updated on November 6, 2026 and PeriopSim on November 1, 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.*