Filters vs Diary AI
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"
Diary AI
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Extract handwritten notes from a notebook or planner into your computer or mobile device with the Diary AI App. - On device processing Text recognition on-device AI, no lookup on cloud AI. - Text export Quickly export recognized text into note-taking apps such as Notes and Freeform.
Screenshots
Verdict
The clearest difference is update cadence: Diary AI at every 16 months 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 Diary AI $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Filters ships an update every 40 months, Diary AI every 16 months. The most recent releases landed on October 9, 2026 and October 23, 2026 respectively.
| Parameter | Filters | Diary AI |
|---|---|---|
| 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 16 months — 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 | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Gianluca Natalini | Juiko Ong |
In-app purchases
Filters
No in-app purchases
Diary AI
No in-app purchases
