# RepeaterBook vs Probiotic Search

The clearest difference is price: RepeaterBook at Free against Probiotic Search's $6.99. RepeaterBook also leads on ratings volume (247 vs 1) and update cadence (every 3 weeks vs every 6 weeks). Probiotic Search's advantage is rating (5.0 vs 4.2) and in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

RepeaterBook is free to download; Probiotic Search costs $6.99 up front. RepeaterBook sells 1 in-app purchase, starting at $14.99 per year. Probiotic Search asks for nothing beyond the download.

Probiotic Search holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: RepeaterBook has 247 ratings behind it against 1, so its average is the more settled of the two.

RepeaterBook ships an update every 3 weeks, Probiotic Search every 6 weeks. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | RepeaterBook | Probiotic Search |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | [4.2 (247 ratings)](https://appshunter.io/ios/app/repeaterbook/id606820166/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/probiotic-search/id6756029907/reviews)** |
| Number of ratings | **247** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | **Free** | Paid |
| Size | 51 MB | 1 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Nicolas Associates Ltd](https://appshunter.io/developer/606820189) | [Mark Brudnak](https://appshunter.io/developer/1858071632) |

## What reviewers say

### RepeaterBook

[App page](https://appshunter.io/ios/app/repeaterbook/id606820166)

This app provides a comprehensive, offline directory of amateur radio repeaters worldwide. It allows for fast and flexible searching, filtering, and sorting of repeater details based on various criteria, including location and call sign. Users can also easily submit updates to the community database.

**Highlights:** Offline repeater directory, Comprehensive search and filtering, Location-based repeater details, Submit updates to database, Portrait and landscape views, Search history

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $14.99 | per year |

**What reviewers like**

- 🚀 Fast and efficient repeater search functionality
- 📱 Works offline with downloaded database
- 🗺️ Location-based repeater discovery
- 👍 Free application with no cost
- 🔄 Regular database updates maintained

**What reviewers complain about**

- 🐛 Location detection issues and inaccuracies
- ❌ Missing repeaters in database
- 📱 iOS version has more issues than Android
- 🔍 Inconsistent data between app and website
- ❓ Confusing interface for new users

**Reported bugs**

- Location services showing repeaters hundreds of miles away
- App not displaying any repeaters despite correct filters
- iOS version showing incorrect frequency data
- Recent update losing user data and settings
- Location feature not finding nearby repeaters

**Requested features**

- Map display of repeater locations
- Field name labels for repeater details
- Coverage range information for repeaters
- GMRS channel display alongside frequency
- Dark mode support


### Probiotic Search

[App page](https://appshunter.io/ios/app/probiotic-search/id6756029907)

Explore scientific literature on probiotics with this tool. It instantly queries PubMed based on your health topic, displaying study counts for specific probiotic genera and species. The app offers a clean interface to help you understand research findings directly from PubMed.

**Highlights:** Search PubMed by health topic, View probiotic study counts, Explore research directly, Save result sets, Clean interface, No sign-in required

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RepeaterBook free?

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

### Is Probiotic Search free?

Probiotic Search costs $6.99, with no in-app purchases.

### Which has better reviews, RepeaterBook or Probiotic Search?

Probiotic Search is rated higher. RepeaterBook averages 4.2 out of 5 from 247 ratings, while Probiotic Search averages 5.0 from 1 ratings.

### Do RepeaterBook or Probiotic Search have ads?

Neither RepeaterBook nor Probiotic Search shows ads.

### Which is updated more often, RepeaterBook or Probiotic Search?

RepeaterBook ships an update every 3 weeks, and Probiotic Search every 6 weeks. Most recently, RepeaterBook was updated on November 9, 2026 and Probiotic Search on November 5, 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.*