# TdSE vs S61 PPC

The clearest difference is price: TdSE at Free against S61 PPC's $2.99. TdSE also leads on update cadence (every 24 months vs every 48 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

TdSE is free to download; S61 PPC costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TdSE ships an update every 24 months, S61 PPC every 48 months. The most recent releases landed on October 19, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | TdSE | S61 PPC |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 24 months** | Every 48 months |
| Size | 80 MB | 2 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [NC Lab](https://appshunter.io/developer/889870684) | [Arsenal Dev LLC](https://appshunter.io/developer/1559628965) |

## What reviewers say

### TdSE

[App page](https://appshunter.io/ios/app/tdse/id1483912060)

**Features:** macOS Compatibility

**In-app purchases:** none


### S61 PPC

[App page](https://appshunter.io/ios/app/s61-ppc/id1559628963)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TdSE free?

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

### Is S61 PPC free?

S61 PPC costs $2.99, with no in-app purchases.

### Do TdSE or S61 PPC have ads?

Neither TdSE nor S61 PPC shows ads.

### Which is updated more often, TdSE or S61 PPC?

TdSE ships an update every 24 months, and S61 PPC every 48 months. Most recently, TdSE was updated on October 19, 2026 and S61 PPC on May 17, 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.*