Comparison

WaySync vs Flash Signal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

WaySync

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
Read full description

WaySync-M, which is the short for WaySync-Mobile, is a mobile tool for real-time diagnosis and performance evaluation of traffic signal timing plans. It enables users to develop virtual signal controllers on their mobile devices, which run the same timing plans as that running in the field. Together with its advanced features of geo-referencing and dynamic time-space diagram, it allows users to easily diagnose common issues with actuated coordinated signals, such as phase early return, transition, clock drifting, and erroneous offset inputs. It can be used as a supplemental tool for better timing coordinated traffic signals. Dynamic time-space diagram with Integrated vehicular trajectory for best diagnosis and performance evaluation of coordinated traffic signals. Key features: + Display real-time Time-Space Diagram (TSD) of the traffic signals + Display real-time traffic signal timing on Map + Check bandwidth and attainability when edit timing in TSD + Record GPS tracks and videos which can help engineers to improve traffic performance + Support optimization for non-common cycles * Wifi-only iPad cannot record GPS tracks without external GPS device.

About

Flash Signal

Features
Read full description

Manipulate time, color, and timing to create your own flash signal

Screenshots

WaySync4 screens
Flash Signal3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences · 6 level
WaySync versus Flash Signal: the parameters behind the verdict, then further details
ParameterWaySyncFlash Signal
PriceFreeFree
Rating5.0 (11 ratings) — better—
Number of ratings11 — better—
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size44 MB22 MB
Age rating4+4+
DeveloperTraffic Signal Coordination Technologies, IncKyoungHun Joo

In-app purchases

1 purchases

WaySync

One-time1
  • One month Pro WaySync-M$499.99
None

Flash Signal

No in-app purchases

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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