# SPL vs IO

The clearest difference is iOS requirement: SPL at 9.3 against IO's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

SPL ships an update every 6 days, IO every 2 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | SPL | IO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/spl-12/id1549379598/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 15 MB |
| Requires iOS | **9.3** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Delta Seven Kft.](https://appshunter.io/developer/1355331300) | [CJ Solution UG (haftungsbeschraenkt)](https://appshunter.io/developer/1870234861) |

## What reviewers say

### SPL

[App page](https://appshunter.io/ios/app/spl-12/id1549379598)

This utility app serves as a companion for the E-mu SP-12 drum machine, enabling users to save and load sequencer and sound memory data via MIDI. It includes a manual and sample banks for connection verification, with an upgrade option for custom sound loading.

**Highlights:** Save and load sequencer data, Save and load sound memory data, MIDI connection support, Built-in manual, Sample banks for connection verification, Upgrade for custom sound loading

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Functionality | $29.99 | one-time |


### IO

[App page](https://appshunter.io/ios/app/io-inspector/id6758009180)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version Lifetime | $17.99 | one-time |


## Frequently asked questions

### Is SPL free?

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

### Is IO free?

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

### Do SPL or IO have ads?

Neither SPL nor IO shows ads.

### Which is updated more often, SPL or IO?

SPL ships an update every 6 days, and IO every 2 weeks. Most recently, SPL was updated on November 3, 2026 and IO 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.*