# Otto Voice vs Spools

The clearest difference is in-app purchases: Spools at none against Otto Voice's 1. Otto Voice's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Otto Voice sells 1 in-app purchase, starting at $4.99 per month. Spools asks for nothing beyond the download.

Otto Voice ships an update every 3 weeks, Spools monthly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Otto Voice | Spools |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 60 MB | 2 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [ERIC ROBERT SAMORE](https://appshunter.io/developer/1887945064) | [euca](https://appshunter.io/developer/1853318106) |

## What reviewers say

### Otto Voice

[App page](https://appshunter.io/ios/app/otto-voice/id6761136862)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Otto Voice Monthly | $4.99 | per month |


### Spools

[App page](https://appshunter.io/ios/app/spools-thread-archive/id6761332667)

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

**In-app purchases:** none


## Frequently asked questions

### Is Otto Voice free?

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

### Is Spools free?

Spools is free to download, with no in-app purchases.

### Do Otto Voice or Spools have ads?

Neither Otto Voice nor Spools shows ads.

### Which is updated more often, Otto Voice or Spools?

Otto Voice ships an update every 3 weeks, and Spools monthly. Most recently, Otto Voice was updated on November 5, 2026 and Spools on November 5, 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.*