# Relay Check vs Retime Calc

The clearest difference is price: Relay Check at Free against Retime Calc's $2.99. Relay Check also leads on device support (3 vs 1). Retime Calc's advantage is update cadence (every 6 weeks vs every 4 months). On ads, in-app purchases and iOS requirement there is nothing between them.

Relay Check is free to download; Retime Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Relay Check ships an update every 4 months, Retime Calc every 6 weeks. The most recent releases landed on October 19, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Relay Check | Retime Calc |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 8 MB | 1 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JAMF Software](https://appshunter.io/developer/290965542) | [Warren Hickman](https://appshunter.io/developer/1896772926) |

## What reviewers say

### Relay Check

[App page](https://appshunter.io/ios/app/relay-check/id6742145178)

**Features:** Vision Pro support

**In-app purchases:** none


### Retime Calc

[App page](https://appshunter.io/ios/app/retime-calc/id6771155236)

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

**In-app purchases:** none


## Frequently asked questions

### Is Relay Check free?

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

### Is Retime Calc free?

Retime Calc costs $2.99, with no in-app purchases.

### Do Relay Check or Retime Calc have ads?

Neither Relay Check nor Retime Calc shows ads.

### Which is updated more often, Relay Check or Retime Calc?

Relay Check ships an update every 4 months, and Retime Calc every 6 weeks. Most recently, Relay Check was updated on October 19, 2026 and Retime Calc on September 23, 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.*