# RT60 vs Hi

The clearest difference is rating: Hi at 5.0 against RT60's 3.4. Hi also leads on review sentiment (100% vs 67%) and update cadence (fortnightly vs every 6 months). RT60's advantage is ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

RT60 costs $34.99 and Hi $34.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hi holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: RT60 has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of RT60's written reviews are positive against 100% of Hi's.

RT60 ships an update every 6 months, Hi fortnightly. The most recent releases landed on October 27, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | RT60 | Hi |
| --- | --- | --- |
| Price | $34.99 | $34.99 |
| Rating | [3.4 (5 ratings)](https://appshunter.io/ios/app/rt60/id298840320/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hi-fi-damper-calculator/id6740542005/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 28 MB | 15 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Artificial Intelligence Technologies J.K. Oy](https://appshunter.io/developer/1050973715) |

## What reviewers say

### RT60

[App page](https://appshunter.io/ios/app/rt60/id298840320)

This tool measures reverb decay time across octave bands using pink noise. It conforms to ISO 3382 standards for room acoustics and can display results from 50ms to 4 seconds. Save measurement graphs for reports.

**Highlights:** Measures reverb decay time, Octave band analysis (63Hz - 4kHz), Conforms to ISO 3382 standard, T20 and T30 measurement methods, Adjustable decay time range (50ms - 4s), Save measurement graphs, Microphone calibration

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

**In-app purchases:** none


### Hi

[App page](https://appshunter.io/ios/app/hi-fi-damper-calculator/id6740542005)

Calculate and design custom ball-pack dampers for your audio equipment. This app helps you select the right reservoirs, number of balls, and dimensions to effectively reduce vibrations for improved audio playback. Build your own cost-effective damping solutions tailored to your needs.

**Highlights:** Select damping solution based on audio equipment weight, Choose reservoir shape and ball diameter, Calculate number of balls per reservoir, Determine net volume and dimensions, Reduce microvibrations and oscillations, Cost-effective DIY assembly

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

**In-app purchases:** none


## Frequently asked questions

### Is RT60 free?

RT60 costs $34.99, with no in-app purchases.

### Is Hi free?

Hi costs $34.99, with no in-app purchases.

### Which has better reviews, RT60 or Hi?

Hi is rated higher. RT60 averages 3.4 out of 5 from 5 ratings, while Hi averages 5.0 from 1 ratings.

### Do RT60 or Hi have ads?

Neither RT60 nor Hi shows ads.

### Which is updated more often, RT60 or Hi?

RT60 ships an update every 6 months, and Hi fortnightly. Most recently, RT60 was updated on October 27, 2026 and Hi on August 18, 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.*