Comparison

LM AUDIO vs EQ550

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

Head to head
About

LM AUDIO

This application allows users to control various audio settings for car amplifiers with integrated DSP. Adjust EQ, bass, 3D sound, time alignment, and filters. Save and load sound settings directly from your phone or the amplifier.

Highlights
  • DSP control
  • EQ adjustment
  • Bass and 3D sound settings
  • Time alignment
  • Filter control
  • Save sound settings to phone
  • Save sound settings to amplifier
Features
Read full description

After connecting App to Car Amplifier with Integrated DSP,  EQ, BASS, 3D SOUND,TIME ALIGNMENT, PHASE, MUTE, FILTER , SAVE SOUND SETTING TO PHONE, SAVE SOUND SETTING TO AMPLIFIER, LOAD SOUND SETTING FROM PHONE, RCA OUTPUT etc could be controlled through this App. How to use: 1.Install App and turn on power of car 2. Turn on Bluetooth on your iPhone 3,Open App and wait for around 5 seconds, then click “Connect” icon in left corner of bottom. Amplifier will be connected to App automatically. 4.DIY you preferred sound and then click “Save to AMP” icon to save. Or click “ Save to Phone” to save.   Note: 1.Do not exit app during saving and do not turn off power supply, program may be shut down caused by this.

About

EQ550

This audio effect plugin emulates classic American EQs from the late 1960s, offering precise control over equalization with unique Proportional Q technology. It functions as a standalone app or an AUv3 plugin for compatible hosts, providing a flexible and characterful sound shaping experience.

Highlights
  • Standalone and AUv3 plugin
  • 3 bands of classic American equalization
  • Proportional Q filter bandwidth
  • Stereo, Mid, or Side EQ modes
  • Undo/Redo and A/B comparison
  • Scalable GUI
Read full description

EQ550 AUv3 plug-in — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the EQ550 AUv3 plug-in as many times as you want, thereby you get the Demo period again and again.) Unlimited version of EQ550 AUv3 plug-in comes as In-App Purchase. The EQ550 faithfully captures the punch, low-frequency transparency, and ultra-tight imaging of iconic American EQs of the late 1960’s. Making use of Proportional Q intuitively widens the filter bandwidth at minimal settings and narrows it at higher settings without the need for additional bandwidth controls. This unique feature minimizes the «phase-shift» sound found in many equalizers. Features: • Standalone and AUv3 plug-in; • 3 bands of classic American equalization; • Each band offers 7 selected frequency centers; • Maximum 15dB of boost/cut per band; • EQ Band 1 and 3 offer shelf/peak switching; • Proportional Q narrows filter Q at extremes; • Stereo (Mono), Mid or Side EQ modes; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Built-in Gain Match; • Scalable GUI. The EQ550 provides reciprocal equalization at 21 points in 5 steps of boost to a maximum of 15dB of gain at each point. The twenty one equalization points are divided into three overlapping ranges. The high and low frequency ranges are individually selectable as either peaking or shelving, and a band-pass filter may be inserted independently of all other selected equalization settings. Frequency ranges and boost/cut are selected by switches, and a pushbutton «IN» switch allows the EQ to be silently introduced to the signal path. A small toggle switch is used to insert the band-pass filter into the EQ550. The EQ550 extends the features of the original hardware and joins the flexibility of the digital world to the character of the analog processing. Allows you to choose between equalizer modes (Stereo, Mid, Side) and remove analogue saturation from the processing circuit to deliver pure digital sound. To use EQ550 as a plug-in, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — EQ550 will appear in the list of Audio Unit extensions for effect plug-ins in the host app.

Screenshots

LM AUDIO4 screens
EQ5504 screens

Verdict

The call

The clearest difference is in-app purchases: LM AUDIO at none against EQ550's 1. LM AUDIO also leads on iOS requirement (7.0 vs 10.0). EQ550's advantage is review sentiment (33% vs 0%) and update cadence (monthly vs every 3 months). On price, ads 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. EQ550 sells 1 one-off in-app purchase. LM AUDIO asks for nothing beyond the download.

UpkeepUpdate frequency

LM AUDIO ships an update every 3 months, EQ550 monthly. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
LM AUDIO versus EQ550: the parameters behind the verdict, then further details
ParameterLM AUDIOEQ550
PriceFreeFree
Rating—4.5 (11 ratings) — better
Positive reviews0.0% of reviews33.3% of reviews — better
Number of ratings—11 — better
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better10.0
Further details — not scored
Size3 MB20 MB
Age rating4+4+
DeveloperPT. Kramat MotorRRS, OOO

Customer experience

LM AUDIO

Written reviews5 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

EQ550

All ratings11 ratings
Positive81.8%
Neutral9.1%
Negative9.1%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

In-app purchases

None

LM AUDIO

No in-app purchases

1 purchases

EQ550

One-time1
  • RRS EQ550 Unlimited$4.99

Questions

Is LM AUDIO free?
LM AUDIO is free to download, with no in-app purchases.
Is EQ550 free?
EQ550 is free to download, with in-app purchases available.
Do LM AUDIO or EQ550 have ads?
Neither LM AUDIO nor EQ550 shows ads.
Which is updated more often, LM AUDIO or EQ550?
LM AUDIO ships an update every 3 months, and EQ550 monthly. Most recently, LM AUDIO was updated on October 24, 2026 and EQ550 on October 24, 2026.

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