# Kleverb vs Mantis

The clearest difference is price: Mantis at $14.99 against Kleverb's $19.99. Mantis also leads on rating (5.0 vs 4.8) and device support (3 vs 1). Kleverb's advantage is update cadence (every 4 months vs every 9 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Kleverb costs $19.99 and Mantis $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mantis holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 13 and 8 respectively.

Kleverb ships an update every 4 months, Mantis every 9 months. The most recent releases landed on September 23, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Kleverb | Mantis |
| --- | --- | --- |
| Price | $19.99 | **$14.99** |
| Rating | [4.8 (13 ratings)](https://appshunter.io/ios/app/kleverb/id1438836422/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/mantis-bbd-echo/id1673531514/reviews)** |
| Number of ratings | **13** | 8 |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | Paid | Paid |
| Size | 22 MB | 10 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Klevgrand Produkter AB](https://appshunter.io/developer/1118902192) | [AudioThing Ltd.](https://appshunter.io/developer/1659941236) |

## What reviewers say

### Kleverb

[App page](https://appshunter.io/ios/app/kleverb/id1438836422)

This app offers a high-quality algorithmic reverb effect with an intuitive interface. It allows for detailed simulation of various room acoustics and includes features like modulation and a ducker for precise sound shaping. Suitable for diverse musical genres.

**Highlights:** Algorithmic reverb effect, Room size selection (SMALL, MEDIUM, LARGE), Selectable filters on reflections, Wet signal modulation, Damping and diffusion parameters, Integrated ducker with sidechain, Standalone app and AUv3 plugin

**In-app purchases:** none


### Mantis

[App page](https://appshunter.io/ios/app/mantis-bbd-echo/id1673531514)

This audio plugin emulates a vintage 70s analog delay/echo unit, offering a warm, authentic sound. It features four echo taps, swell selectors, and a unique modulation section for chorus-like effects.

**Highlights:** Emulates rare 70s BBD delay/echo, Warm analog sound, Four echo taps, Four swell selectors, Rotafaze modulation section, Mimics tape echo wow/flutter, Chorus-delay effect

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Kleverb free?

Kleverb costs $19.99, with no in-app purchases.

### Is Mantis free?

Mantis costs $14.99, with no in-app purchases.

### Which has better reviews, Kleverb or Mantis?

Mantis is rated higher. Kleverb averages 4.8 out of 5 from 13 ratings, while Mantis averages 5.0 from 8 ratings.

### Do Kleverb or Mantis have ads?

Neither Kleverb nor Mantis shows ads.

### Which is updated more often, Kleverb or Mantis?

Kleverb ships an update every 4 months, and Mantis every 9 months. Most recently, Kleverb was updated on September 23, 2026 and Mantis 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.*