# WaySync vs Flash Signal

The clearest difference is in-app purchases: Flash Signal at none against WaySync's 1. WaySync's advantage is ads (none vs shown) and iOS requirement (13.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. WaySync sells 1 one-off in-app purchase. Flash Signal asks for nothing beyond the download.

WaySync ships an update every 2 weeks, Flash Signal every 3 weeks. The most recent releases landed on September 14, 2026 and May 19, 2026 respectively.

## The numbers

| Metric | WaySync | Flash Signal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/waysync-m/id1365233778/reviews)** | — |
| Number of ratings | **11** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | — |
| Size | 44 MB | 22 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Traffic Signal Coordination Technologies, Inc](https://appshunter.io/developer/1685429655) | [KyoungHun Joo](https://appshunter.io/developer/1529420794) |

## What reviewers say

### WaySync

[App page](https://appshunter.io/ios/app/waysync-m/id1365233778)

This mobile tool diagnoses and evaluates traffic signal timing plans in real-time. It allows users to create virtual signal controllers on their devices that mimic field operations, helping to identify common issues with coordinated signals.

**Highlights:** Real-time Time-Space Diagram display, Real-time traffic signal timing on Map, Check bandwidth and attainability in TSD, Record GPS tracks and videos, Support optimization for non-common cycles, Develop virtual signal controllers

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One month Pro WaySync-M | $499.99 | one-time |


### Flash Signal

[App page](https://appshunter.io/ios/app/flash-signal/id1548182503)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WaySync free?

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

### Is Flash Signal free?

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

### Do WaySync or Flash Signal have ads?

Flash Signal shows ads; WaySync does not.

### Which is updated more often, WaySync or Flash Signal?

WaySync ships an update every 2 weeks, and Flash Signal every 3 weeks. Most recently, WaySync was updated on September 14, 2026 and Flash Signal on May 19, 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.*