# Operative Dentistry Cram Cards vs Kois Reader

The clearest difference is price: Kois Reader at Free against Operative Dentistry Cram Cards's $9.99. Operative Dentistry Cram Cards's advantage is update cadence (every 3 weeks vs every 9 months) and iOS requirement (12.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

Kois Reader is free to download; Operative Dentistry Cram Cards costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Operative Dentistry Cram Cards ships an update every 3 weeks, Kois Reader every 9 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Operative Dentistry Cram Cards | Kois Reader |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[3.6 (10 ratings)](https://appshunter.io/ios/app/kois-reader/id1132199528/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 9 months |
| Monetization | — | Free |
| Size | 27 MB | 75 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Cram Cards](https://appshunter.io/developer/733135273) | [Kois Center](https://appshunter.io/developer/513136947) |

## What reviewers say

### Operative Dentistry Cram Cards

[App page](https://appshunter.io/ios/app/operative-dentistry-cram-cards/id1040406343)

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

**In-app purchases:** none


### Kois Reader

[App page](https://appshunter.io/ios/app/kois-reader/id1132199528)

Access Kois Course materials, including manuals, checklists, and videos. Features live polling, automatic note backup and syncing across devices, and the ability to share notes with other participants. Requires course attendance for full access.

**Highlights:** Access course manuals and videos, Live in-course polling, Automatic note backup and sync, Share notes with participants, Browse page thumbnails, Navigation history

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

**In-app purchases:** none


## Frequently asked questions

### Is Operative Dentistry Cram Cards free?

Operative Dentistry Cram Cards costs $9.99, with no in-app purchases.

### Is Kois Reader free?

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

### Do Operative Dentistry Cram Cards or Kois Reader have ads?

Neither Operative Dentistry Cram Cards nor Kois Reader shows ads.

### Which is updated more often, Operative Dentistry Cram Cards or Kois Reader?

Operative Dentistry Cram Cards ships an update every 3 weeks, and Kois Reader every 9 months. Most recently, Operative Dentistry Cram Cards was updated on November 2, 2026 and Kois Reader on November 2, 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.*