# Filters vs Valdis

The clearest difference is price: Valdis at Free against Filters's $0.99. Valdis also leads on update cadence (every 8 days vs every 40 months) and device support (3 vs 1). Filters's advantage is iOS requirement (16.0 vs 18.0). On ads and in-app purchases there is nothing between them.

Valdis 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, Valdis every 8 days. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Filters | Valdis |
| --- | --- | --- |
| 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 8 days** |
| Monetization | Paid | — |
| Size | 3 MB | 82 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Alexander Vlasov](https://appshunter.io/developer/1868628304) |

## 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


### Valdis

[App page](https://appshunter.io/ios/app/valdis/id6757744130)

**In-app purchases:** none


## Frequently asked questions

### Is Filters free?

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

### Is Valdis free?

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

### Do Filters or Valdis have ads?

Neither Filters nor Valdis shows ads.

### Which is updated more often, Filters or Valdis?

Filters ships an update every 40 months, and Valdis every 8 days. Most recently, Filters was updated on November 1, 2026 and Valdis on October 25, 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.*