# cTrials vs BTMon Plus

The clearest difference is in-app purchases: cTrials at none against BTMon Plus's 2. cTrials also leads on iOS requirement (11.1 vs 15.0). BTMon Plus's advantage is update cadence (every 3 months vs every 12 months). On price, ads and device support there is nothing between them.

Both are free to download. BTMon Plus sells 2 in-app purchases, starting at $9.99 per month. cTrials asks for nothing beyond the download.

cTrials ships an update every 12 months, BTMon Plus every 3 months. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | cTrials | BTMon Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (3 ratings)](https://appshunter.io/ios/app/ctrials/id362035301/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 12 MB | 8 MB |
| Requires iOS | **11.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Visual Soft Inc.](https://appshunter.io/developer/336927487) | [Anatoly Butko](https://appshunter.io/developer/300289656) |

## What reviewers say

### cTrials

[App page](https://appshunter.io/ios/app/ctrials/id362035301)

This app provides a mobile interface for searching clinical trials listed on clinicaltrials.gov. It offers user-friendly navigation with basic, advanced, and country-specific search options. Users can save trials to favorites, email listings, and contact investigators.

**Highlights:** Clinical trial search, Basic and advanced search options, Search by country/state, Save trials to favorites, Email trial listings, Contact investigators, Search history

**In-app purchases:** none


### BTMon Plus

[App page](https://appshunter.io/ios/app/btmon-plus/id1132377866)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | per month |
| Premium | $39.99 | per year |


## Frequently asked questions

### Is cTrials free?

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

### Is BTMon Plus free?

BTMon Plus is free to download, with in-app purchases available.

### Do cTrials or BTMon Plus have ads?

Neither cTrials nor BTMon Plus shows ads.

### Which is updated more often, cTrials or BTMon Plus?

cTrials ships an update every 12 months, and BTMon Plus every 3 months. Most recently, cTrials was updated on October 9, 2026 and BTMon Plus on October 11, 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.*