# Filters vs Pencil

The clearest difference is price: Pencil at Free against Filters's $0.99. Pencil also leads on rating (4.0 vs 3.0) and update cadence (every 8 days vs every 40 months). Filters's advantage is in-app purchases (none vs 2) and iOS requirement (16.0 vs 26.0). On ads and device support there is nothing between them.

Pencil is free to download; Filters costs $0.99 up front. Pencil sells 2 in-app purchases, starting at $2.99 per month. Filters asks for nothing beyond the download.

Pencil holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 0% of Filters's written reviews are positive against 25% of Pencil's.

Filters ships an update every 40 months, Pencil every 8 days. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Filters | Pencil |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/filters/id369326771/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/pencil-pdf-notes-with-pencil/id6466286421/reviews)** |
| Number of ratings | 1 | **4** |
| Positive reviews | 0.0% of reviews | **25.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 8 days** |
| Monetization | Paid | **Freemium** |
| Size | 3 MB | 504 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Kairoos Solutions SL](https://appshunter.io/developer/978066434) |

## 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


### Pencil

[App page](https://appshunter.io/ios/app/pencil-pdf-notes-with-pencil/id6466286421)

Create beautiful notes, sketch ideas, and annotate PDFs with advanced ink tools and AI assistance. Convert handwriting to text, scan documents, and organize files seamlessly across cloud services. Enjoy a realistic ink-on-paper feel with stylus support.

**Highlights:** Advanced ink tools for writing and sketching, AI Assistant for summarization and translation, Handwritten notes to editable text conversion, Document scanning with automatic frame recognition, Cloud service integration for file management, Full-text search for PDFs, PDF reader with highlighting and read aloud

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All and AI Assistant | $2.99 | per month |
| GoodPencil Upgrade | $3.99 | one-time |


## Frequently asked questions

### Is Filters free?

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

### Is Pencil free?

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

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

Pencil is rated higher. Filters averages 3.0 out of 5 from 1 ratings, while Pencil averages 4.0 from 4 ratings.

### Do Filters or Pencil have ads?

Neither Filters nor Pencil shows ads.

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

Filters ships an update every 40 months, and Pencil every 8 days. Most recently, Filters was updated on October 9, 2026 and Pencil on October 24, 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.*