# SelfSync vs SUB. Marathon Pace & Training

The clearest difference is update cadence: SUB. Marathon Pace & Training at every 3 days against SelfSync's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SelfSync ships an update every 3 months, SUB. Marathon Pace & Training every 3 days. The most recent releases landed on September 25, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SelfSync | SUB. Marathon Pace & Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 52 MB | 72 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [c100k](https://appshunter.io/developer/1687515684) | [Ching Kin Lau](https://appshunter.io/developer/1856543957) |

## What reviewers say

### SelfSync

[App page](https://appshunter.io/ios/app/selfsync/id6670619423)

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

**In-app purchases:** none


### SUB. Marathon Pace & Training

[App page](https://appshunter.io/ios/app/sub-marathon-pace-and-training/id6755816775)

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

**In-app purchases:** none


## Frequently asked questions

### Is SelfSync free?

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

### Is SUB. Marathon Pace & Training free?

SUB. Marathon Pace & Training is free to download, with no in-app purchases.

### Do SelfSync or SUB. Marathon Pace & Training have ads?

Neither SelfSync nor SUB. Marathon Pace & Training shows ads.

### Which is updated more often, SelfSync or SUB. Marathon Pace & Training?

SelfSync ships an update every 3 months, and SUB. Marathon Pace & Training every 3 days. Most recently, SelfSync was updated on September 25, 2026 and SUB. Marathon Pace & Training on October 1, 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.*