# Muscle Study Guide vs Cair

The clearest difference is price: Cair at Free against Muscle Study Guide's $6.99. Cair also leads on update cadence (every 3 weeks vs every 38 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Cair is free to download; Muscle Study Guide costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Muscle Study Guide ships an update every 38 months, Cair every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Muscle Study Guide | Cair |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/cair-the-patient-app/id6473017427/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 65 MB | 83 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ryan Bittorf](https://appshunter.io/developer/650449038) | [Talentship, LLC](https://appshunter.io/developer/1603830771) |

## What reviewers say

### Muscle Study Guide

[App page](https://appshunter.io/ios/app/muscle-study-guide/id6446385667)

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

**In-app purchases:** none


### Cair

[App page](https://appshunter.io/ios/app/cair-the-patient-app/id6473017427)

Securely access and manage your dental records from any provider. Keep track of your oral health history, appointments, and treatment plans all in one place. Communicate with your dental team and ensure better care, whether at home or traveling.

**Highlights:** Secure dental record access, Manage family dental records, Appointment scheduling, Review treatment plans, Communicate with dental team, Consolidated health information

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

**In-app purchases:** none


## Frequently asked questions

### Is Muscle Study Guide free?

Muscle Study Guide costs $6.99, with no in-app purchases.

### Is Cair free?

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

### Do Muscle Study Guide or Cair have ads?

Neither Muscle Study Guide nor Cair shows ads.

### Which is updated more often, Muscle Study Guide or Cair?

Muscle Study Guide ships an update every 38 months, and Cair every 3 weeks. Most recently, Muscle Study Guide was updated on November 3, 2026 and Cair on November 4, 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.*