# SampleTank CS vs Midiflow Keyboard (Audiobus)

The clearest difference is price: SampleTank CS at Free against Midiflow Keyboard (Audiobus)'s $2.99. SampleTank CS also leads on update cadence (every 2 months vs every 9 months) and ratings volume (143 vs 6). Midiflow Keyboard (Audiobus)'s advantage is rating (5.0 vs 3.1) and in-app purchases (none vs 10). On ads and device support there is nothing between them.

SampleTank CS is free to download; Midiflow Keyboard (Audiobus) costs $2.99 up front. SampleTank CS sells 10 one-off in-app purchases. Midiflow Keyboard (Audiobus) asks for nothing beyond the download.

Midiflow Keyboard (Audiobus) holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: SampleTank CS has 143 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 29% of SampleTank CS's written reviews are positive against 50% of Midiflow Keyboard (Audiobus)'s.

SampleTank CS ships an update every 2 months, Midiflow Keyboard (Audiobus) every 9 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | SampleTank CS | Midiflow Keyboard (Audiobus) |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [3.1 (143 ratings)](https://appshunter.io/ios/app/sampletank-cs/id464775965/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/midiflow-keyboard-audiobus/id1092870508/reviews)** |
| Number of ratings | **143** | 6 |
| Positive reviews | 28.9% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 1.5 GB | 5 MB |
| Requires iOS | 13.0 | **10.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IK Multimedia US, LLC](https://appshunter.io/developer/323694278) | [Johannes Doerr](https://appshunter.io/developer/622204117) |

## What reviewers say

### SampleTank CS

[App page](https://appshunter.io/ios/app/sampletank-cs/id464775965)

This professional mobile sound and groove workstation brings desktop-level virtual instrument power to your iPhone and iPad. It offers a vast array of world-class instruments and patterns for live performance and composition, with expandable sound libraries available for purchase.

**Highlights:** 23 free instruments in 16 categories, 8-part multitimbral sound module, Expandable sound library with 2300+ instruments, Over 1,200 melodic and rhythmic patterns, 8-track MIDI recorder with audio export, Intuitive interface and new sound engine, Song and Live environments

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Organ | $4.99 | one-time |
| Strings | $4.99 | one-time |
| Brass | $4.99 | one-time |
| Synth Pads | $4.99 | one-time |
| The Grid | $14.99 | one-time |
| Upgrade to SampleTank | $24.99 | one-time |
| Miroslav Philharmonik - Mobile Edition | $24.99 | one-time |
| Sonik Synth - Mobile Edition | $24.99 | one-time |
| All Sounds | $64.99 | one-time |
| SampleTank PRO - All Sounds Pack | $64.99 | one-time |

**What reviewers like**

- 🚀 Great sound quality
- 👍 Easy to use
- 💡 Excellent for live performances

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔒 Issues with in-app purchases and restoring purchases
- 🔋 High memory usage
- 👎 Lack of updates and support

**Reported bugs**

- Incompatible with latest iOS versions
- MIDI issues and lack of device detection
- Purchased content not properly restored

**Requested features**

- Add AU/AUv3 support for better DAW integration
- Improve MIDI functionality and mapping
- Allow importing custom samples
- Enhance performance controls (e.g., pitch bend, modulation)


### Midiflow Keyboard (Audiobus)

[App page](https://appshunter.io/ios/app/midiflow-keyboard-audiobus/id1092870508)

This music app provides a versatile keyboard interface for controlling multiple synth applications simultaneously. It offers various layouts, including piano, scales, and chords, with customizable controls for pitch, modulation, and note velocity. Designed to integrate seamlessly with Audiobus 3, it enhances mobile music production.

**Highlights:** Piano, scale, and chord layouts, Multiple independent keyboard strips, Adjustable key range and octaves, Pitch-bend and modulation wheels, Hold mode with unisono option, Velocity control via touch or accelerometer, Split View/Slide Over support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SampleTank CS free?

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

### Is Midiflow Keyboard (Audiobus) free?

Midiflow Keyboard (Audiobus) costs $2.99, with no in-app purchases.

### Which has better reviews, SampleTank CS or Midiflow Keyboard (Audiobus)?

Midiflow Keyboard (Audiobus) is rated higher. SampleTank CS averages 3.1 out of 5 from 143 ratings, while Midiflow Keyboard (Audiobus) averages 5.0 from 6 ratings.

### Do SampleTank CS or Midiflow Keyboard (Audiobus) have ads?

Neither SampleTank CS nor Midiflow Keyboard (Audiobus) shows ads.

### Which is updated more often, SampleTank CS or Midiflow Keyboard (Audiobus)?

SampleTank CS ships an update every 2 months, and Midiflow Keyboard (Audiobus) every 9 months. Most recently, SampleTank CS was updated on November 6, 2026 and Midiflow Keyboard (Audiobus) on November 2, 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.*