# Filters vs Clew

The clearest difference is price: Clew at Free against Filters's $0.99. Clew also leads on rating (5.0 vs 3.0) and update cadence (every 3 weeks vs every 40 months). Filters's advantage is in-app purchases (none vs 3) and iOS requirement (16.0 vs 18.0). On ads and device support there is nothing between them.

Clew is free to download; Filters costs $0.99 up front. Clew sells 3 one-off in-app purchases. Filters asks for nothing beyond the download.

Clew holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Filters ships an update every 40 months, Clew every 3 weeks. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Filters | Clew |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/filters/id369326771/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/clew-highlights-and-notes/id6477902274/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3 MB | 36 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Thomas Twardzik](https://appshunter.io/developer/1731056279) |

## 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


### Clew

[App page](https://appshunter.io/ios/app/clew-highlights-and-notes/id6477902274)

Capture and organize quotes, notes, and highlights from books, articles, films, and podcasts. Discover connections between your saved content through powerful tagging and intelligent recommendations. This app acts as a digital commonplace book, synced across all your devices.

**Highlights:** Save highlights from books, web, film, TV, and podcasts, Organize and search saved content, Discover connections between saved items, Tagging and intelligent recommendations, Syncs across all devices, Camera scanning for book pages

**Features:** macOS Compatibility, Safari Extension, Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip - $0.99 | $0.99 | one-time |
| Generous Tip - $2.99 | $2.99 | one-time |
| Super Tip - $9.99 | $9.99 | one-time |


## Frequently asked questions

### Is Filters free?

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

### Is Clew free?

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

### Which has better reviews, Filters or Clew?

Clew is rated higher. Filters averages 3.0 out of 5 from 1 ratings, while Clew averages 5.0 from 3 ratings.

### Do Filters or Clew have ads?

Neither Filters nor Clew shows ads.

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

Filters ships an update every 40 months, and Clew every 3 weeks. Most recently, Filters was updated on October 9, 2026 and Clew on October 10, 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.*