Custom Sound vs Flat Equalizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Custom Sound
This application allows users to control IP Speakers and Wifi Speakers by adjusting various audio parameters. It offers features like frequency and gain adjustment, filter type selection, and the ability to save custom presets for personalized sound experiences.
- Adjust frequency, gain, and q factor
- Select filter types
- Adjust input gain
- Save current presets
- Automatic device search
Read full descriptionHide full description
Custom Sound is the updated version of CS-EQ is used to control IP Speakers and Wifi Speakers. Features: 1.Adjust frequency, gain, q factor , filter type and other parameters of eq 2.Adjust input gain 3. Save current preset. 4.Search device automatically. 5.Apply to iOS 6.0 and later.
Flat Equalizer
Enhance your audio with a professional music equalizer and powerful volume booster. Fine-tune tracks with custom presets or create your own settings. Experience immersive sound with advanced features for wired and wireless headphones.
- 10-band music equalizer
- Headphone volume booster
- Customizable EQ presets
- Extra Boost feature
- Bluetooth equalizer support
- Save custom EQ settings
Read full descriptionHide full description
Unlock the true potential of your audio with Flat Equalizer, the ultimate sound tool for your device. Fine-tune your tracks with our professional-grade music equalizer and experience a powerful headphone volume booster that brings every beat to life. Our app works seamlessly as a headphone equalizer and supports wireless connections with our equalizer bluetooth technology. Whether you need an audio booster for clarity or a robust sound booster for impact, our app delivers unparalleled control. Transform your listening experience with Headphone Equalizer, the all-in-one audio booster and sound enhancement suite. Dive deep into your music library and take full control with our advanced 10-band equalizer, a perfect tool as a dedicated headphone booster. Our powerful music equalizer comes with built-in presets like Rock and Full Bass, or you can create and save your own custom settings for any genre, making it the ultimate tool for audiophiles. Not just an equalizer, this app is also a formidable headphone volume booster. Feel the energy with our "Extra Boost" feature, a powerful sound booster that elevates your music to new heights without distortion. This incredible headphone booster makes every song more immersive, especially when using our advanced headphone equalizer. The powerful combination ensures crystal-clear audio even over wireless connections, making it the best equalizer bluetooth on the market. Take your audio from flat to fantastic with the ultimate enhancement tool. Download Headphone Equalizer now and hear the difference!
Screenshots
Verdict
The clearest difference is in-app purchases: Custom Sound at none against Flat Equalizer's 4. Custom Sound also leads on iOS requirement (8.0 vs 17.6). Flat Equalizer's advantage is update cadence (fortnightly vs every 7 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
Both are free to download. Flat Equalizer sells 4 in-app purchases, starting at $2.99 per 7 days. Custom Sound asks for nothing beyond the download.
Custom Sound ships an update every 7 months, Flat Equalizer fortnightly. The most recent releases landed on October 4, 2026 and October 17, 2026 respectively.
| Parameter | Custom Sound | Flat Equalizer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 94.6% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 7 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 8.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | SEIKAKU | Md Milon Hossain |
Customer experience
Custom Sound
Flat Equalizer
In-app purchases
Custom Sound
No in-app purchases
Flat Equalizer
- Weekly3 Days trial$2.997 Days
- Yearly3 Days trial$99.001 Year
- Lifetime$9.99
- Lifetime$29.99
Questions
Is Custom Sound free?
Is Flat Equalizer free?
Do Custom Sound or Flat Equalizer have ads?
Which is updated more often, Custom Sound or Flat Equalizer?
Other comparisons















