# BL vs Sentinel

The clearest difference is in-app purchases: BL at none against Sentinel's 1. BL also leads on ads (none vs shown) and iOS requirement (14.3 vs 18.6). Sentinel's advantage is update cadence (every 4 weeks vs every 29 months). On price and device support there is nothing between them.

Both are free to download. Sentinel sells 1 one-off in-app purchase. BL asks for nothing beyond the download.

BL ships an update every 29 months, Sentinel every 4 weeks. The most recent releases landed on September 10, 2026 and June 27, 2026 respectively.

## The numbers

| Metric | BL | Sentinel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 29 months | **Every 4 weeks** |
| Size | 1 MB | 12 MB |
| Requires iOS | **14.3** | 18.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Blulogica Srl](https://appshunter.io/developer/1549483851) | [ALI EMIR CIHAN](https://appshunter.io/developer/1850444654) |

## What reviewers say

### BL

[App page](https://appshunter.io/ios/app/bl-easytimer/id1549483849)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sentinel

[App page](https://appshunter.io/ios/app/sentinel-wifi-network-scanner/id6760856503)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sentinel Pro (Ömür Boyu) | $9.99 | one-time |


## Frequently asked questions

### Is BL free?

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

### Is Sentinel free?

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

### Do BL or Sentinel have ads?

Sentinel shows ads; BL does not.

### Which is updated more often, BL or Sentinel?

BL ships an update every 29 months, and Sentinel every 4 weeks. Most recently, BL was updated on September 10, 2026 and Sentinel on June 27, 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.*