Comparison

Speed Tracker mach4 vs KDA Tracker & Joule Calc

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

Head to head
About

Speed Tracker mach4

Measure the speed of objects using Doppler radar technology. This app accurately tracks speeds from 250 to 1250 m/s with precision better than 0.1%. Available on various Apple devices.

Highlights
  • Doppler radar speed measurement
  • Speed range: 250-1250 m/s
  • Accuracy better than 0.1%
  • Supports Apple Watch, iPhone, iPad, iPod
Read full description

The speed Doppler radar cover 250 to 1250 m/s ( 820 - 3940 fps ) speed range with an accuracy better than 0.1 %

About

KDA Tracker & Joule Calc

Read full description

Gear up with the ultimate tactical companion for your next Airsoft or MilSim skirmish! KDA Tracker & Joules is an immersive, dark tactical HUD designed specifically for players who want to calibrate their gear and track their combat telemetry in real time. KEY FEATURES: • CHRONOGRAPH & JOULE CALCULATOR Quickly convert velocity (FPS or m/s) and pellet mass (grams) into Kinetic Energy (Joules). Ensure field safety compliance with localized velocity-to-Joule standards. • BB WEIGHT PRESETS & CUSTOM INPUTS Switch instantly between standard BB weights (0.20g, 0.23g, 0.25g, 0.28g, 0.30g, 0.32g, 0.36g, 0.40g, 0.43g, 0.45g, 0.48g, 0.50g) or input custom weights. • TACTICAL BALLISTICS TELEMETRY (PRO) Go beyond basic calculations. Simulate aerodynamic drag for 6mm projectiles. Check predicted muzzle velocities, velocity decay charts over distance (up to 60m), and expected Target Flight Time in milliseconds. • COMBAT DECK OPERATIONAL BOARD Track kills, deaths, and assists on the fly. Features a giant high-contrast "I'M HIT!" button to increment defeats and trigger an active respawn countdown. • MULTI-INTERVAL RESPAWN TIMER Choose presets from 2m to 60m. Integrates with push notifications to buzz your phone exactly when tactical entry is allowed, keeping your eyes on the field. • MATCH HISTORY & ARCHIVES Save skirmish summaries to a local database. Monitor your average KDA, K/D ratio, and overall trend charts. Export logs directly to CSV spreadsheet files. • MILITARY HUD INTERFACE THEMES Stay in the zone with our high-contrast, eye-friendly dark design themes. Pick from Stealth Green, Desert Strike, Arctic Frost, or Red Night HUD interfaces. Whether you are calibrating a replica at the chrono station or fighting on the field, KDA Tracker & Joules puts military-grade telemetry on your wrist and phone.

Screenshots

Speed Tracker mach44 screens
KDA Tracker & Joule Calc4 screens

Verdict

The call

The clearest difference is in-app purchases: Speed Tracker mach4 at none against KDA Tracker & Joule Calc's 1. Speed Tracker mach4 also leads on ads (none vs shown) and device support (4 vs 2). KDA Tracker & Joule Calc's advantage is update cadence (every 3 days vs every 6 weeks). On price 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. KDA Tracker & Joule Calc sells 1 one-off in-app purchase. Speed Tracker mach4 asks for nothing beyond the download.

UpkeepUpdate frequency

Speed Tracker mach4 ships an update every 6 weeks, KDA Tracker & Joule Calc every 3 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
Speed Tracker mach4 versus KDA Tracker & Joule Calc: the parameters behind the verdict, then further details
ParameterSpeed Tracker mach4KDA Tracker & Joule Calc
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 6 weeksEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS9 — better15.1
Further details — not scored
Size78 MB40 MB
Age rating4+4+
DevelopernVistiKamil Bobrowski

In-app purchases

None

Speed Tracker mach4

No in-app purchases

1 purchases

KDA Tracker & Joule Calc

One-time1
  • Remove Ads – Lifetime Access$1.99

Questions

Is Speed Tracker mach4 free?
Speed Tracker mach4 is free to download, with no in-app purchases.
Is KDA Tracker & Joule Calc free?
KDA Tracker & Joule Calc is free to download, with in-app purchases available.
Do Speed Tracker mach4 or KDA Tracker & Joule Calc have ads?
KDA Tracker & Joule Calc shows ads; Speed Tracker mach4 does not.
Which is updated more often, Speed Tracker mach4 or KDA Tracker & Joule Calc?
Speed Tracker mach4 ships an update every 6 weeks, and KDA Tracker & Joule Calc every 3 days. Most recently, Speed Tracker mach4 was updated on November 3, 2026 and KDA Tracker & Joule Calc on November 6, 2026.

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