# Filters vs Automation Notification System

The clearest difference is price: Automation Notification System at Free against Filters's $0.99. Automation Notification System also leads on update cadence (every 5 months vs every 40 months) and iOS requirement (9.3 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

Automation Notification System is free to download; Filters costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Filters ships an update every 40 months, Automation Notification System every 5 months. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Filters | Automation Notification System |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/filters/id369326771/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 5 months** |
| Monetization | Paid | — |
| Size | 3 MB | 21 MB |
| Requires iOS | 16.0 | **9.3** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Alphline Technologies Pte Ltd](https://appshunter.io/developer/789642410) |

## What reviewers say

### Filters

[App page](https://appshunter.io/ios/app/filters/id369326771)

This application assists in calculating electronic filter components for speaker systems. It automatically determines inductor and capacitor values based on desired impedance and cutoff frequency, and designs circuits for various speaker types. Users can visualize frequency and phase diagrams for their custom speaker designs.

**Highlights:** Automatic electronic component calculation, Frequency and phase diagram display (Bode plots), Electronic circuit schema display, Support for various speaker types (high, mid, low, sub), First and second-order filter design, Complete filter theory and formulas

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

**In-app purchases:** none


### Automation Notification System

[App page](https://appshunter.io/ios/app/automation-notification-system/id1165272284)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Filters free?

Filters costs $0.99, with no in-app purchases.

### Is Automation Notification System free?

Automation Notification System is free to download, with no in-app purchases.

### Do Filters or Automation Notification System have ads?

Neither Filters nor Automation Notification System shows ads.

### Which is updated more often, Filters or Automation Notification System?

Filters ships an update every 40 months, and Automation Notification System every 5 months. Most recently, Filters was updated on October 9, 2026 and Automation Notification System on October 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.*