# ThermVoltTube vs spool.

ThermVoltTube and spool. are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. ThermVoltTube sells 1 one-off in-app purchase and spool. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | ThermVoltTube | spool. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (7 ratings)](https://appshunter.io/ios/app/spool-tape-synth/id6785721308/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Monetization | — | Free with in-app purchases |
| Size | 27 MB | 2 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shoma Kondo](https://appshunter.io/developer/1884832972) | [Kristopher Yang](https://appshunter.io/developer/6785721310) |

## What reviewers say

### ThermVoltTube

[App page](https://appshunter.io/ios/app/thermvolttube/id6777901033)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThermVoltTube Full Version | $4.99 | one-time |


### spool.

[App page](https://appshunter.io/ios/app/spool-tape-synth/id6785721308)

Create full songs on your phone with this pocket music studio. It offers a variety of sound engines, sampling capabilities, step sequencing, and a 4-track tape recorder for recording and mixing your music. Effects and MIDI controller support enhance the creative process.

**Highlights:** Multiple sound engines, Sampling and sequencing, 4-track tape recording, Extensive effects rack, MIDI controller support, Step sequencer

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spool Pro | $9.99 | one-time |


## Frequently asked questions

### Is ThermVoltTube free?

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

### Is spool. free?

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

### Do ThermVoltTube or spool. have ads?

Neither ThermVoltTube nor spool. shows ads.

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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.*