Comparison

HARMONY DSP vs DS18 iDSP

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

Head to head
About

HARMONY DSP

Features
Read full description

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 8 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 EQ’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 (MP2/4, WMA, APE, FLAC, AAC, M4A,WAV, AIF, AIFC). From the App it is possible to access the folders and the contained audio files.

About

DS18 iDSP

Control specific digital sound processor models with a user-friendly interface. Adjust audio settings like routing, gain, crossover, and equalization in real-time. Includes a demo mode for learning and battery/limiter monitoring.

Highlights
  • Channel Routing
  • Gain Control (General & Channel)
  • Crossover Settings
  • Limiter & Equalizer Adjustments
  • Time Alignment
  • Configurable Memories
  • Battery & Limiter Monitoring
Features
Read full description

This application is designed to control only these DSP models: i48DSP, i26DSP and i24DSP. Now with a simple and intuitive interface you can manage your sound system completely using the following settings: • Channels Routing • General Gain • Channels Gain • Crossover • Limiter • Input Equalizer • Output Equalizer • Phase Selector • Time Alignment • Configurable Memories • Battery Monitoring • Limiter Monitoring Through a didactic and intuitive interface, it is possible do all the DSP configurations from this App using a smartphone or tablet, making easier the system adjustments, it can be done from your audio system in real time and there is a demo mode for the people who don't have some experience with this yet and can learn how it works.

Screenshots

HARMONY DSP4 screens
DS18 iDSP4 screens

Verdict

The call

The clearest difference is update cadence: DS18 iDSP at every 6 months against HARMONY DSP's every 19 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

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

HARMONY DSP ships an update every 19 months, DS18 iDSP every 6 months. The most recent releases landed on October 3, 2026 and October 20, 2026 respectively.

Scorecard1 real difference · 8 level
HARMONY DSP versus DS18 iDSP: the parameters behind the verdict, then further details
ParameterHARMONY DSPDS18 iDSP
PriceFreeFree
Rating—1.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 19 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better12.2
Further details — not scored
Size3 MB59 MB
Age rating4+17+
DeveloperAPEX ItalySPIRIT LLC

In-app purchases

None

HARMONY DSP

No in-app purchases

None

DS18 iDSP

No in-app purchases

Questions

Is HARMONY DSP free?
HARMONY DSP is free to download, with no in-app purchases.
Is DS18 iDSP free?
DS18 iDSP is free to download, with no in-app purchases.
Do HARMONY DSP or DS18 iDSP have ads?
Neither HARMONY DSP nor DS18 iDSP shows ads.
Which is updated more often, HARMONY DSP or DS18 iDSP?
HARMONY DSP ships an update every 19 months, and DS18 iDSP every 6 months. Most recently, HARMONY DSP was updated on October 3, 2026 and DS18 iDSP on October 20, 2026.

Other comparisons