CuSnP vs Filterjam
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CuSnP
This app acts as a container for a sympathetic string simulation Audio Unit Extension. It requires another application to function, where it generates resonant sounds based on input audio. It's designed for musicians and audio producers.
- Sympathetic string simulation
- Audio Unit Extension (AU)
- Resonates with input audio
- Container for AU functionality
- Documentation included
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CuSnP is an Audio Unit Extension, or AU, for the iPhone and iPad. This application is simply a container for the AU and serves only as the documentation. CuSnP must be used in some sort of AU host or DAW application. CuSnP is a sympathetic string simulation. Input audio excites the strings and causes them to resonate much like the open strings on a piano will resonate when some other sound source excites them.
Filterjam
This app offers a multiband resonant filter for creating unique audio effects. It divides input signals into four bands, allowing for various sonic manipulations from subtle enhancements to extreme sound mangling.
- Multiband resonant filtering
- 4-band signal division
- Sum or multiply band modes
- Versatile sound shaping
- Ringmod-like effects
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Filterjam is a multi-band resonant filter delivering weird ringmod-like filtered sounds. The input signal is divided into 4 bands that are then summed or multiplied together according to the selected mode. Filterjam can be very harsh or gentle, it can add brightness or depth to synth sounds, but it can also completely mangle acoustic sources.
Screenshots
Verdict
The clearest difference is update cadence: CuSnP at every 2 months against Filterjam's every 22 months. CuSnP also leads on review sentiment (100% vs 83%) and iOS requirement (11.0 vs 14.0). Filterjam's advantage is rating (5.0 vs 4.8). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Filterjam holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 36 and 34 respectively. Written reviews complicate that: 100% of CuSnP's written reviews are positive against 83% of Filterjam's, so the app with the better star average is not the one people write more warmly about.
CuSnP ships an update every 2 months, Filterjam every 22 months. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.
| Parameter | CuSnP | Filterjam |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (36 ratings) | 5.0 (34 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 36 — better | 34 |
| Update frequency | Every 2 months — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 9 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Neon Silicon | AudioThing Ltd. |
Customer experience
CuSnP
Filterjam
In-app purchases
CuSnP
No in-app purchases
Filterjam
No in-app purchases
