Comparison

ZP 6.4 AMP vs Thunder DSP

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

ZP 6.4 AMP

Features

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ZP 6.4 AMP-15 The ZP 6.4 AMP-15 app allows the user to full control their ZEVOX ZP 6.4 AMP-15 at the Setting section to contour audio system to fit your tastes with the ability to apply crossovers, 15 bands of parametric/graphic EQ independent per channel, delay, assignable inputs/outputs, USB audio player and even stream music, The ZP 6.4 AMP-15 is the right path to make great sound in your car.

About

Thunder DSP

Features

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Thunder DSP APP controls the DSP parameters of the Thunder DSP-15A speaker via Bluetooth. feature: 1. Adjust the frequency, gain, q factor, filter type and other parameters of eq; 2. Adjust the input gain, Mute; 3. Save the current preset to the device or locally, and load the preset. 4. Restore factory settings with one click.

Screenshots

ZP 6.4 AMP4 screens

Thunder DSP2 screens

Verdict

The call

The clearest difference is update cadence: Thunder DSP at every 5 days against ZP 6.4 AMP's every 9 months. ZP 6.4 AMP's advantage is iOS requirement (9.0 vs 11.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ZP 6.4 AMP ships an update every 9 months, Thunder DSP every 5 days. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 4 level

ZP 6.4 AMP versus Thunder DSP: the parameters behind the verdict, then further details
Parameter	ZP 6.4 AMP	Thunder DSP
Price	Free	Free
Update frequency	Every 9 months	Every 5 days — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	9.0 — better	11.0
Further details — not scored
Size	2 MB	5 MB
Age rating	4+	4+
Developer	Maslim Djanuanto	AMERICAN PRO INTERNATIONAL CORP

In-app purchases

None

ZP 6.4 AMP

No in-app purchases

None

Thunder DSP

No in-app purchases

Questions

Is ZP 6.4 AMP free?

ZP 6.4 AMP is free to download, with no in-app purchases.

Is Thunder DSP free?

Thunder DSP is free to download, with no in-app purchases.

Do ZP 6.4 AMP or Thunder DSP have ads?

Neither ZP 6.4 AMP nor Thunder DSP shows ads.

Which is updated more often, ZP 6.4 AMP or Thunder DSP?

ZP 6.4 AMP ships an update every 9 months, and Thunder DSP every 5 days. Most recently, ZP 6.4 AMP was updated on October 27, 2026 and Thunder DSP on October 30, 2026.