# FBAToolkit vs Seller Siren

The clearest difference is rating: FBAToolkit at 5.0 against Seller Siren's 4.3. FBAToolkit also leads on in-app purchases (none vs 4). Seller Siren's advantage is update cadence (every 5 weeks vs every 11 months) and review sentiment (51% vs 29%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Seller Siren sells 4 in-app purchases, starting at $5.99 per month. FBAToolkit asks for nothing beyond the download.

FBAToolkit holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Seller Siren has 128 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 29% of FBAToolkit's written reviews are positive against 51% of Seller Siren's, so the app with the better star average is not the one people write more warmly about.

FBAToolkit ships an update every 11 months, Seller Siren every 5 weeks. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | FBAToolkit | Seller Siren |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fbatoolkit/id1112778020/reviews)** | [4.3 (128 ratings)](https://appshunter.io/ios/app/seller-siren/id1406513010/reviews) |
| Number of ratings | 2 | **128** |
| Positive reviews | 28.6% of reviews | **51.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 8 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pathfinding S.A.](https://appshunter.io/developer/1112778019) | [Jason Childs](https://appshunter.io/developer/1406513009) |

## What reviewers say

### FBAToolkit

[App page](https://appshunter.io/ios/app/fbatoolkit/id1112778020)

This app offers a suite of tools for Amazon sellers using Fulfillment By Amazon (FBA). It features product analysis, allowing users to scan barcodes or enter them manually to generate reports on offers, sales rates, profit, and markup to aid purchasing decisions.

**Highlights:** FBA seller tools, Product analysis, Barcode scanning, Sales rate estimation, Profit calculation, Markup calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### Seller Siren

[App page](https://appshunter.io/ios/app/seller-siren/id1406513010)

Receive instant push notifications for Amazon sales directly on your phone, with optional sound effects. Avoid constantly checking Seller Central and customize alerts by SKU, marketplace, or sales volume. View detailed sales data within the app.

**Highlights:** Live Amazon sales push notifications, Optional sound effects for sales, Customizable notification filters (SKU, marketplace, sales count), View detailed sales dashboard, Worldwide marketplace support

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $5.99 | per month |
| Monthly Subscription (Promo) | $5.99 | per month |
| Yearly Subscription | $49.99 | per year |
| Yearly Subscription (Promo) | $49.99 | per year |

**What reviewers like**

- 🔔 Instant sale notifications
- 🎶 Fun notification sounds (Cha-Ching!)
- 🌍 Supports all marketplaces worldwide
- 📊 Provides sales data (daily/weekly/monthly totals)
- 📸 Includes product images in notifications

**What reviewers complain about**

- 💸 Too expensive / Outrageous pricing
- 💰 Significant price increases
- 🚫 Login issues / Can't access app
- 📉 Unreliable / Works intermittently
- ⏳ Delayed notifications

**Reported bugs**

- App not working / stops working
- Login screen issues (asking to sign up again)
- Notifications are delayed
- Sale price inaccurate
- App deactivates frequently

**Requested features**

- Improve notification accuracy and speed
- More customization for alerts
- Better support responsiveness
- Grandfathering in existing users for subscription changes
- Improve the 'Cha-Ching!' sound quality


## Frequently asked questions

### Is FBAToolkit free?

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

### Is Seller Siren free?

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

### Which has better reviews, FBAToolkit or Seller Siren?

FBAToolkit is rated higher. FBAToolkit averages 5.0 out of 5 from 2 ratings, while Seller Siren averages 4.3 from 128 ratings.

### Do FBAToolkit or Seller Siren have ads?

Neither FBAToolkit nor Seller Siren shows ads.

### Which is updated more often, FBAToolkit or Seller Siren?

FBAToolkit ships an update every 11 months, and Seller Siren every 5 weeks. Most recently, FBAToolkit was updated on October 24, 2026 and Seller Siren on October 26, 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.*