DSP vs PZ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DSP
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Connect smart devices and read song information from USB drives
PZ
This app allows for advanced, non-destructive audio modifications in cars using a 6-core DSP chip. It offers precise sound tuning, Bluetooth and USB music playback, and smartphone integration for personalized audio experiences.
- 6-core 32-bit DSP processing
- DRC dynamic music processing
- Bluetooth and USB music playback
- Smartphone sound customization
- 31-band EQ tuning
- Adjustable sound field delay
- Lossless installation
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This product is non-destructive audio car modification of new products,exclusive use of 6-core 32-bit DSP processing Chip,nanosecond processing speed; DRC dynamic music processing; using DSP computer tuning technology. Possess a large-capacity filter capacitor. Lossless installation,easy tuning,take up a small space. Maximum power output 6×150 W; Large-capacity filter capacitor; 4CH high level/low level input and 6CH high level output 6X150W/8CH RCA output Support remote controller(optional)/Wire harness for over 300 different cars. Support Bluetooth play. USB play lossless music. Pair your smartphone with the DSP box and tailor the sound to your personal preference. Frequency response:20Hz-20KHz. Crossover with Variable Frequency (6/12/18/24/36/48 dB oct). Adjustable sound field delay to achieve spatial editing. All eight channels with 31 Band floating piont tuning/seperate time. Built-in 31-segment adjustable EQ—31 band EQ floating-point high precision tuning system Visually adjust the Frequency, Gain, and Q value of each channel. noise gate control Built in ADEP (Advanced Diagnostics Error Protection), APP inside music play (New function,you can play your phone music inside sound tuning app directly) Augmented Bass control，you can control subwoofer volume without use wired remote.Please make sure subwoofer channel set properly.
Screenshots
Verdict
The clearest difference is update cadence: PZ at every 8 days against DSP's every 5 months. PZ also leads on iOS requirement (9.0 vs 12.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DSP ships an update every 5 months, PZ every 8 days. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.
| Parameter | DSP | PZ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 28.6% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | 明武 伍 | huizhou shangshui technology co.,ltd |
In-app purchases
DSP
No in-app purchases
PZ
No in-app purchases
