# Bitcoin Sentinel vs Currency transformer

The clearest difference is in-app purchases: Currency transformer at none against Bitcoin Sentinel's 1. Currency transformer also leads on ads (none vs shown). Bitcoin Sentinel's advantage is update cadence (every 3 weeks vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Bitcoin Sentinel sells 1 in-app purchase, starting at $0.49 per month. Currency transformer asks for nothing beyond the download.

Bitcoin Sentinel ships an update every 3 weeks, Currency transformer every 7 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Bitcoin Sentinel | Currency transformer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (70 ratings)](https://appshunter.io/ios/app/bitcoin-sentinel/id1249710742/reviews)** | — |
| Number of ratings | **70** | — |
| Positive reviews | 77.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 8 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LFTek](https://appshunter.io/developer/1333122242) | [Diogenes Souza](https://appshunter.io/developer/1208473543) |

## What reviewers say

### Bitcoin Sentinel

[App page](https://appshunter.io/ios/app/bitcoin-sentinel/id1249710742)

Track cryptocurrency prices in real-time with quick visualizations and custom alerts. Monitor various coins and their values across different currencies, view exchange charts, and stay updated with relevant news.

**Highlights:** Real-time cryptocurrency price tracking, Customizable value alerts, Multiple currency support, Exchange charts visualization, Cryptocurrency news feed, Support for numerous altcoins

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Coffee (without Ads) | $0.49 | per month |


### Currency transformer

[App page](https://appshunter.io/ios/app/currency-transformer/id1553396310)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bitcoin Sentinel free?

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

### Is Currency transformer free?

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

### Do Bitcoin Sentinel or Currency transformer have ads?

Bitcoin Sentinel shows ads; Currency transformer does not.

### Which is updated more often, Bitcoin Sentinel or Currency transformer?

Bitcoin Sentinel ships an update every 3 weeks, and Currency transformer every 7 months. Most recently, Bitcoin Sentinel was updated on November 2, 2026 and Currency transformer on November 3, 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.*