# SimpleFFT vs PLD2

The clearest difference is in-app purchases: PLD2 at none against SimpleFFT's 1. PLD2 also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 18 months). On price and device support there is nothing between them.

Both are free to download. SimpleFFT sells 1 one-off in-app purchase. PLD2 asks for nothing beyond the download.

SimpleFFT ships an update every 18 months, PLD2 every 3 weeks. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | SimpleFFT | PLD2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 3 weeks** |
| Size | 5 MB | 20 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [64seconds, Inc.](https://appshunter.io/developer/436682942) |

## What reviewers say

### SimpleFFT

[App page](https://appshunter.io/ios/app/simplefft/id1239257017)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Functions | $0.49 | one-time |


### PLD2

[App page](https://appshunter.io/ios/app/pld2/id1446072426)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SimpleFFT free?

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

### Is PLD2 free?

PLD2 is free to download, with no in-app purchases.

### Do SimpleFFT or PLD2 have ads?

SimpleFFT shows ads; PLD2 does not.

### Which is updated more often, SimpleFFT or PLD2?

SimpleFFT ships an update every 18 months, and PLD2 every 3 weeks. Most recently, SimpleFFT was updated on October 10, 2026 and PLD2 on September 29, 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.*