# DelayTool vs ARIA ONE

The clearest difference is price: ARIA ONE at Free against DelayTool's $0.99. ARIA ONE also leads on update cadence (every 8 days vs every 42 months) and iOS requirement (15.0 vs 26.0). DelayTool's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

ARIA ONE is free to download; DelayTool costs $0.99 up front. ARIA ONE sells 1 one-off in-app purchase. DelayTool asks for nothing beyond the download.

DelayTool ships an update every 42 months, ARIA ONE every 8 days. Both last shipped on October 6, 2026.

## The numbers

| Metric | DelayTool | ARIA ONE |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/delaytool-bpm-calculator/id982070192/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 8 days** |
| Monetization | Paid | — |
| Size | 2 MB | 419 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Joel Perry](https://appshunter.io/developer/972887837) | [Altitude Audio](https://appshunter.io/developer/1736195719) |

## What reviewers say

### DelayTool

[App page](https://appshunter.io/ios/app/delaytool-bpm-calculator/id982070192)

This application helps musicians and sound engineers calculate precise timing values for musical subdivisions. It automatically updates a table of milliseconds and Hertz based on the entered tempo, ideal for setting up delays and oscillators.

**Highlights:** BPM calculator, Tempo input and tap tempo, Automatic table updates, Calculates milliseconds and Hertz, Supports common musical subdivisions, Precise delay and oscillator setup

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

**In-app purchases:** none


### ARIA ONE

[App page](https://appshunter.io/ios/app/aria-one/id6761255827)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ARIA AI Credits — 20 Pack | $19.99 | one-time |


## Frequently asked questions

### Is DelayTool free?

DelayTool costs $0.99, with no in-app purchases.

### Is ARIA ONE free?

ARIA ONE is free to download, with in-app purchases available.

### Do DelayTool or ARIA ONE have ads?

Neither DelayTool nor ARIA ONE shows ads.

### Which is updated more often, DelayTool or ARIA ONE?

DelayTool ships an update every 42 months, and ARIA ONE every 8 days. Most recently, DelayTool was updated on October 6, 2026 and ARIA ONE on October 6, 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.*