Comparison

VT Check App vs QLacUpdater

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

Head to head

VTCheck

QLac Sensor Updater

About

VT Check App

Features

Read full description

VT Check helps endurance athletes identify their exercise intensity during workouts using real-time respiratory and heart rate analytics based on physiological studies and statistical modeling. HOW IT WORKS 1. Connect a respiratory sensor or heart rate monitor to your device 2. Perform workouts with real-time intensity feedback 3. Review detailed analysis on the web dashboard at vtcheck.com KEY FEATURES - Real-time zone detection with color-coded gauge (green/yellow/red) - Customizable workout templates (create on web, sync to phone and watch) - Automatic calibration that improves from your workout history - Drift analysis to verify metabolic stability - Multi-device sync between phone, watch, and web dashboard

About

QLacUpdater

Features

Read full description

Companion app for Q-LAC sensors: firmware updates and device management.

Screenshots

VT Check App4 screens

QLacUpdater4 screens

Verdict

The call

The clearest difference is update cadence: VT Check App at every 5 days against QLacUpdater's monthly. QLacUpdater's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

VT Check App ships an update every 5 days, QLacUpdater monthly. Both last shipped on October 28, 2026.

Scorecard2 real differences · 4 level

VT Check App versus QLacUpdater: the parameters behind the verdict, then further details
Parameter	VT Check App	QLacUpdater
Price	Free	Free
Update frequency	Every 5 days — better	Monthly
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	13.0 — better
Further details — not scored
Size	29 MB	23 MB
Age rating	4+	4+
Developer	Robert Chung	Oxymotion

In-app purchases

None

VT Check App

No in-app purchases

None

QLacUpdater

No in-app purchases

Questions

Is VT Check App free?

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

Is QLacUpdater free?

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

Do VT Check App or QLacUpdater have ads?

Neither VT Check App nor QLacUpdater shows ads.

Which is updated more often, VT Check App or QLacUpdater?

VT Check App ships an update every 5 days, and QLacUpdater monthly. Most recently, VT Check App was updated on October 28, 2026 and QLacUpdater on October 28, 2026.