# Fastclock vs SelfBrief

The clearest difference is price: SelfBrief at Free against Fastclock's $0.99. SelfBrief also leads on update cadence (every 5 weeks vs every 5 months) and iOS requirement (13.0 vs 16.6). On ads, in-app purchases and device support there is nothing between them.

SelfBrief is free to download; Fastclock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fastclock ships an update every 5 months, SelfBrief every 5 weeks. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Fastclock | SelfBrief |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/fastclock/id1360618003/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 38 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Hoerlein](https://appshunter.io/developer/1360618002) | [SelfBrief Limited](https://appshunter.io/developer/1708730424) |

## What reviewers say

### Fastclock

[App page](https://appshunter.io/ios/app/fastclock/id1360618003)

This utility app allows users to adjust time speed on their local network, up to 20 times faster than normal. It ensures only one instance distributes time signals and enables stopping time at a specific point, ideal for scheduled events.

**Highlights:** Adjustable time speed (1x to 20x), Multicast time distribution over Wi-Fi, MCClock Standard support, Single instance network check, Stop time at specific point, Suitable for event scheduling

**Features:** macOS Compatibility

**In-app purchases:** none


### SelfBrief

[App page](https://appshunter.io/ios/app/selfbrief/id6467506430)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fastclock free?

Fastclock costs $0.99, with no in-app purchases.

### Is SelfBrief free?

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

### Do Fastclock or SelfBrief have ads?

Neither Fastclock nor SelfBrief shows ads.

### Which is updated more often, Fastclock or SelfBrief?

Fastclock ships an update every 5 months, and SelfBrief every 5 weeks. Most recently, Fastclock was updated on September 10, 2026 and SelfBrief on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*