Comparison

Xcelsus vs HB II DSP

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

Head to head
About

Xcelsus

Features
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Xcelsus is a professional car audio tuning tool. Through this software, you can directly connect to the car's audio system to make professional and detailed fine-tuning of the overall sound effect, so that the car's sound effect can achieve the best effect and enhance the sound experience.Make perfect car audio effects.

About

HB II DSP

Features
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The Harmony DSP App allows you to setup and tune your system with your smart phone or tablet. In the main screen you will find the Input Source menu where you can choose BT, HI-LEV, USB and AUX. Here you also find 6 Presets (saved into your device) to choose from, you access the Music Player, you have the Main and Subwoofer Volume, and the Advanced menu with Channels, EQ, System and Mixing. From the Channel Page, you can assign the function of each speaker, check the Phase for polarity, adjust the individual Channel Gains and set Delay in milliseconds or centimeters, for a rock solid and accurate front stage. The EQ page holds the heart and the brains of the App. You can use either the Graphic or the Paragraphic EQโ€™s. You can customize the crossovers to fit the needs of your individual system. You have adjustments for Gain, frequency, and Q factor. You can work on channels individually or you can link them. With the MIX function you can manually determine which inputs (USB-L/R, Digital-L/R, BT-L/R) will be used for each output (processing channel) and how much of each input the output will receive. The new Music Player function lets you have full control of all your favorite songs, inside the App. Be sure to connect a proper USB device containing audio files in the supported format. From the App it is possible to access the folders and the contained audio files.

Screenshots

Xcelsus4 screens
HB II DSP4 screens

Verdict

The call

The clearest difference is update cadence: HB II DSP at fortnightly against Xcelsus's monthly. Xcelsus's advantage is iOS requirement (9.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

Xcelsus ships an update monthly, HB II DSP fortnightly. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

Scorecard2 real differences ยท 4 level
Xcelsus versus HB II DSP: the parameters behind the verdict, then further details
ParameterXcelsusHB II DSP
PriceFreeFree
Update frequencyMonthlyFortnightly โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS9.0 โ€” better15.6
Further details โ€” not scored
Size4 MB3 MB
Age rating4+4+
DeveloperDongguan SNOW Mechanical & Electrical Technology Co., Ltd.APEX Italy

In-app purchases

None

Xcelsus

No in-app purchases

None

HB II DSP

No in-app purchases

Questions

Is Xcelsus free?
Xcelsus is free to download, with no in-app purchases.
Is HB II DSP free?
HB II DSP is free to download, with no in-app purchases.
Do Xcelsus or HB II DSP have ads?
Neither Xcelsus nor HB II DSP shows ads.
Which is updated more often, Xcelsus or HB II DSP?
Xcelsus ships an update monthly, and HB II DSP fortnightly. Most recently, Xcelsus was updated on November 3, 2026 and HB II DSP on October 28, 2026.

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