# iotaTONE vs Locus

The clearest difference is price: Locus at $3.99 against iotaTONE's $14.99. iotaTONE's advantage is iOS requirement (15.6 vs 17.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

iotaTONE costs $14.99 and Locus $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iotaTONE ships an update every 9 days, Locus every 2 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iotaTONE | Locus |
| --- | --- | --- |
| Price | $14.99 | **$3.99** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/locus/id6785296998/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | — | Paid |
| Size | 179 MB | 15 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bond Institute Music Corporation](https://appshunter.io/developer/1784172215) | [Joe Topjian](https://appshunter.io/developer/1860697112) |

## What reviewers say

### iotaTONE

[App page](https://appshunter.io/ios/app/iotatone-microtonal-keyboard/id6739195820)

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

**In-app purchases:** none


### Locus

[App page](https://appshunter.io/ios/app/locus/id6785296998)

This app generates evolving melodic MIDI sequences for electronic music production. It offers thirteen generative archetypes and extensive editing capabilities, allowing users to create unique musical ideas and arrange them into full compositions. It functions as a standalone application or an AUv3 MIDI effect within compatible hosts.

**Highlights:** Generative MIDI sequencing, 13 unique generative archetypes, Seed-derived, reproducible patterns, Evolve, Feel, and Edit controls, Per-note slides with 303-style legato, 25 scales and snap-to-scale pitch, Standalone and AUv3 MIDI effect

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

**In-app purchases:** none


## Frequently asked questions

### Is iotaTONE free?

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

### Is Locus free?

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

### Do iotaTONE or Locus have ads?

Neither iotaTONE nor Locus shows ads.

### Which is updated more often, iotaTONE or Locus?

iotaTONE ships an update every 9 days, and Locus every 2 weeks. Most recently, iotaTONE was updated on October 28, 2026 and Locus 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.*