# Alina String Ensemble vs OB

The clearest difference is price: Alina String Ensemble at $3.99 against OB's $19.99. OB's advantage is update cadence (every 10 days vs every 4 months) and review sentiment (75% vs 52%). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Alina String Ensemble costs $3.99 and OB $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.1 for Alina String Ensemble against 4.1 for OB. Both are backed by a comparable volume of ratings — 19 and 15 respectively. Written reviews are what separate them: 52% of Alina String Ensemble's written reviews are positive against 75% of OB's.

Alina String Ensemble ships an update every 4 months, OB every 10 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Alina String Ensemble | OB |
| --- | --- | --- |
| Price | **$3.99** | $19.99 |
| Rating | [4.1 (19 ratings)](https://appshunter.io/ios/app/alina-string-ensemble/id1036045790/reviews) | **[4.1 (15 ratings)](https://appshunter.io/ios/app/ob-xd-3-auv3-synth/id6654915211/reviews)** |
| Number of ratings | **19** | 15 |
| Positive reviews | 52.4% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Paid | Paid |
| Size | 131 MB | 210 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [insideout ltd.](https://appshunter.io/developer/315046293) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### Alina String Ensemble

[App page](https://appshunter.io/ios/app/alina-string-ensemble/id1036045790)

This app is a musical keyboard simulator that recreates the authentic sounds of the Solina String Ensemble from the 1970s. It features a 49-key, 4-octave keyboard with multiple instrument sounds and built-in effects like reverb and modulation.

**Highlights:** Solina String Ensemble sound simulation, 6 pre-loaded instruments, 49-key, 4-octave keyboard, Core MIDI and MIDI compatible, Built-in spring reverb effect, Adjustable modulation

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

**In-app purchases:** none


### OB

[App page](https://appshunter.io/ios/app/ob-xd-3-auv3-synth/id6654915211)

This app recreates a classic vintage synthesizer, offering rich, full-bodied tones for electronic music, recordings, and film scores. It features MPE support, an on-screen MIDI keyboard, and high-quality rendering for enhanced music production.

**Highlights:** Oberheim OB-X emulation, MPE support, On-screen MIDI keyboard, High-quality retina rendering, AUv3 improvements, Preset search with categories

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Alina String Ensemble free?

Alina String Ensemble costs $3.99, with no in-app purchases.

### Is OB free?

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

### Which has better reviews, Alina String Ensemble or OB?

OB is rated higher. Alina String Ensemble averages 4.1 out of 5 from 19 ratings, while OB averages 4.1 from 15 ratings.

### Do Alina String Ensemble or OB have ads?

Neither Alina String Ensemble nor OB shows ads.

### Which is updated more often, Alina String Ensemble or OB?

Alina String Ensemble ships an update every 4 months, and OB every 10 days. Most recently, Alina String Ensemble was updated on October 24, 2026 and OB on October 24, 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.*