# ThereminAir vs BeatSeq

The clearest difference is price: BeatSeq at $2.99 against ThereminAir's $3.99. BeatSeq also leads on iOS requirement (15.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

ThereminAir costs $3.99 and BeatSeq $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ThereminAir ships an update every 11 days, BeatSeq every 9 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | ThereminAir | BeatSeq |
| --- | --- | --- |
| Price | $3.99 | **$2.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thereminair-theremin-synth/id6772935515/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 9 days** |
| Monetization | Free | — |
| Size | 2 MB | 8 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tom Pardee](https://appshunter.io/developer/1882976406) | [Imran Azizuddin](https://appshunter.io/developer/1815476709) |

## What reviewers say

### ThereminAir

[App page](https://appshunter.io/ios/app/thereminair-theremin-synth/id6772935515)

This app transforms your Apple Watch into a unique theremin instrument. Play music through arm gestures, controlling pitch and volume without touching any buttons. Explore different modes and scales to create a variety of sounds.

**Highlights:** Gesture-based pitch and volume control, Pure mode for continuous glide, Scale modes for staying in tune, Adjustable pitch ranges and vibrato depths, Live readout of frequency and note name, Complication for instant play

**Features:** Apple Watch app

**In-app purchases:** none


### BeatSeq

[App page](https://appshunter.io/ios/app/beatseq-wearable-drum-machine/id6782174559)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ThereminAir free?

ThereminAir costs $3.99, with no in-app purchases.

### Is BeatSeq free?

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

### Do ThereminAir or BeatSeq have ads?

Neither ThereminAir nor BeatSeq shows ads.

### Which is updated more often, ThereminAir or BeatSeq?

ThereminAir ships an update every 11 days, and BeatSeq every 9 days. Most recently, ThereminAir was updated on October 31, 2026 and BeatSeq on October 31, 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.*