# DC vs EQ550b

The clearest difference is price: EQ550b at Free against DC's $2.99. EQ550b also leads on rating (4.8 vs 4.2) and review sentiment (100% vs 67%). DC's advantage is in-app purchases (none vs 1). On ratings volume, ads and device support there is nothing between them.

EQ550b is free to download; DC costs $2.99 up front. EQ550b sells 1 one-off in-app purchase. DC asks for nothing beyond the download.

EQ550b holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 14 and 13 respectively. Written reviews point the same way: 67% of DC's written reviews are positive against 100% of EQ550b's.

DC ships an update every 6 months, EQ550b every 2 weeks. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | DC | EQ550b |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.2 (14 ratings)](https://appshunter.io/ios/app/dc-9-overdrive/id1062115431/reviews) | **[4.8 (13 ratings)](https://appshunter.io/ios/app/eq550b/id1507176549/reviews)** |
| Number of ratings | **14** | 13 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 19 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blamsoft, Inc.](https://appshunter.io/developer/1051938244) | [RRS, OOO](https://appshunter.io/developer/1486125568) |

## What reviewers say

### DC

[App page](https://appshunter.io/ios/app/dc-9-overdrive/id1062115431)

This audio effect plug-in emulates a classic overdrive guitar pedal using advanced circuit modeling. It provides an authentic analog sound and integrates seamlessly with iOS Digital Audio Workstations.

**Highlights:** Circuit-modeled overdrive emulation, Authentic analog sound, Audio Unit Extension (AUv3) support, Expands controls when touched, Compatible with popular iOS DAWs, Desktop quality algorithm

**In-app purchases:** none


### EQ550b

[App page](https://appshunter.io/ios/app/eq550b/id1507176549)

This audio effect plugin emulates a classic American equalizer from the late 1960s, offering four bands of equalization with selectable frequencies and proportional Q. It provides a wide range of tonal variations for professional audio manipulation and can be used as a standalone app or an AUv3 plugin.

**Highlights:** Modeled vintage EQ, Four bands of equalization, Selectable frequency centers, Proportional Q filter, Stereo, Mid, or Side EQ modes, AUv3 plugin compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS EQ550b Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is DC free?

DC costs $2.99, with no in-app purchases.

### Is EQ550b free?

EQ550b is free to download, with in-app purchases available.

### Which has better reviews, DC or EQ550b?

EQ550b is rated higher. DC averages 4.2 out of 5 from 14 ratings, while EQ550b averages 4.8 from 13 ratings.

### Do DC or EQ550b have ads?

Neither DC nor EQ550b shows ads.

### Which is updated more often, DC or EQ550b?

DC ships an update every 6 months, and EQ550b every 2 weeks. Most recently, DC was updated on October 9, 2026 and EQ550b on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*