DelayTool vs Beat Doctor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DelayTool
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.
- BPM calculator
- Tempo input and tap tempo
- Automatic table updates
- Calculates milliseconds and Hertz
- Supports common musical subdivisions
- Precise delay and oscillator setup
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DelayTool is a simple BPM calculator for producers, engineers, and musicians. Enter or tap the tempo and watch the table of values update automagically. For each common musical subdivision, you will see times (in milliseconds and Hertz) for the current tempo. Just what you need to precisely set up delays and oscillators!
Beat Doctor
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Beat Doctor analyzes the tempo of the music that it hears in real time as well as songs from your music library. Beat Doctor draws a bar chart showing how the tempo of the music varies over time. You can play back and zoom in and out on the chart. Use Beat Doctor when practicing to see how steady your tempo is, or use it to get a reference tempo of pre-recorded music. Beat Doctor does a pretty good job of guessing tempo, but it can get easily confused as well. Use Settings to adjust parameters of the tempo detection algorithm. Have fun! Like all my apps, Beat Doctor will never collect any information from you or show you advertising of any kind.
Screenshots
Verdict
The clearest difference is chart position: DelayTool at #200 against Beat Doctor's unranked. Beat Doctor's advantage is iOS requirement (16.0 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
DelayTool costs $0.99 and Beat Doctor $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
DelayTool ships an update every 23 months, Beat Doctor every 17 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | DelayTool | Beat Doctor |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 23 months | Every 17 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #200 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Joel Perry | Michael Geilich |
In-app purchases
DelayTool
No in-app purchases
Beat Doctor
No in-app purchases
