Filters vs Paste to PDF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Filters
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.
- 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
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"Filters" is an application for the calculation of electronic filters for the construction of speaker systems. The program automatically calculates the values of electronic components (inductors, capacitors) of electronic filters depending by the desired speaker impedance and the cutoff frequency. The software can calculate and design the circuits (filters) for high, medium, low, sub woofer, etc... first and second order. Once calculated the filter’s circuit the app will automatically design for You the frequency and phase diagrams (Bode plots). Build the speakers of your dreams with "Filters"! Features: - Automatic calculation of the electronic components of the filters for high, medium, low, sub woofers etc... - Display of frequency and phase diagrams (Bode plots) for the calculated values of the circuit’s electronic components - Display electronic circuit’s schema (filter) - Complete theory for formulas/circuits for all the filters implemented in "Filters"
Paste to PDF
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Paste an image into a PDF file easily! 1) Import a PDF from the Files app. 2) Choose an image from the Photos app. 3) Paste the image, then adjust its size and position. 4) Save the updated PDF back to the Files app. Need to add more images? Simply save your updated PDF, re-import it, and paste additional images.
Screenshots
Verdict
The clearest difference is update cadence: Paste to PDF at every 10 days against Filters's every 40 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Filters costs $0.99 and Paste to PDF $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Filters ships an update every 40 months, Paste to PDF every 10 days. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.
| Parameter | Filters | Paste to PDF |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 40 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Gianluca Natalini | Taichi Kasugai |
In-app purchases
Filters
No in-app purchases
Paste to PDF
No in-app purchases
Questions
Is Filters free?
Is Paste to PDF free?
Do Filters or Paste to PDF have ads?
Which is updated more often, Filters or Paste to PDF?
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