# Tone Pacer Pro vs OptoSense

The clearest difference is price: OptoSense at $9.99 against Tone Pacer Pro's $59.99. OptoSense also leads on update cadence (every 5 days vs every 9 months). Tone Pacer Pro's advantage is in-app purchases (none vs 6) and chart position (#185 vs unranked). On ads and device support there is nothing between them.

Tone Pacer Pro costs $59.99 and OptoSense $9.99 up front. OptoSense sells 6 one-off in-app purchases. Tone Pacer Pro asks for nothing beyond the download.

Tone Pacer Pro ships an update every 9 months, OptoSense every 5 days. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Tone Pacer Pro | OptoSense |
| --- | --- | --- |
| Price | $59.99 | **$9.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tone-pacer-pro/id1102097010/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 days** |
| Monetization | Paid | — |
| Best chart rank | **#185** | — |
| Size | 2 MB | 173 MB |
| Requires iOS | **13.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [George Kukurin](https://appshunter.io/developer/625988735) | [NeuroSense](https://appshunter.io/developer/1805839241) |

## What reviewers say

### Tone Pacer Pro

[App page](https://appshunter.io/ios/app/tone-pacer-pro/id1102097010)

**Currently charting:** #185 Top Paid · Health & Fitness (US App Store)

This professional audio stimulation app offers advanced control for healthcare professionals and researchers. It allows manual frequency setting, alternating modes, and continuous tone output for various neurological and therapeutic applications.

**Highlights:** Custom frequency setting via keypad, Alternating mode between tones, Continuous tone output, Control beeps per minute, Notch-like treatment protocols, Stochastic Vestibular Stimulation support

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

**In-app purchases:** none


### OptoSense

[App page](https://appshunter.io/ios/app/optosense/id6744061471)

**Features:** Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Animals and nature | $2.99 | one-time |
| Vehicles and machines | $2.99 | one-time |
| Faces, dino, animals and toys | $2.99 | one-time |
| Fantasy and mosters | $2.99 | one-time |
| Interactive feature for images | $5.99 | one-time |
| Next Level OPK | $6.99 | one-time |


## Frequently asked questions

### Is Tone Pacer Pro free?

Tone Pacer Pro costs $59.99, with no in-app purchases.

### Is OptoSense free?

OptoSense costs $9.99, and also offers in-app purchases.

### Do Tone Pacer Pro or OptoSense have ads?

Neither Tone Pacer Pro nor OptoSense shows ads.

### Which is updated more often, Tone Pacer Pro or OptoSense?

Tone Pacer Pro ships an update every 9 months, and OptoSense every 5 days. Most recently, Tone Pacer Pro was updated on September 18, 2026 and OptoSense on September 23, 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.*