Adaptive Flow
Watches how many inputs Windows accepts and evens out the stream so nothing gets lost.
PremiumExternal key macro for Windows
Every keypress counts.
a3ths calibrates to your PC, shows how many inputs Windows actually accepts, and lets you draw your speed as a curve.
a3ths
Premium
0KPS accepted · Ready
Start key
Spam key
Mode
Engine
Speed1 200 KPS
Click a key to rebind it. Esc cancels.
Input Lab
Spam key: ESent0
Accepted0
Efficiency—
Total accepted0
Your PC2 400 KPS
Look
Background
Lamp size
Lamp brightness
Profiles
Auto-switch by active gameMain1 200 KPS · Adaptive
Practice400 KPS · Classic
BurstFast start curve · Frame Sync
Account
License activePlanPremium · 30 days
Time left27d 14h
KeyA3TH-••••-••••-7F2C
PCBound
Hold F and watch the background
03delivery engines
~5 sPC calibration
LIVEaccepted-input meter
100%external app
Delivery engine
One speed.
Three ways to deliver it.
The core runs on its own high-priority thread with a precise timer. The UI never touches the timing.
Frame Sync
Bursts are locked to your display refresh rate. Every burst lands in its own frame.
PremiumClassic
A steady stream at a fixed interval. Available to everyone, including Free.
FreeCalibration
Your limit comes
from your PC.
On first launch a3ths spends about 5 seconds finding the maximum your PC delivers reliably. You see right away what Free and Premium give you on your hardware. No hidden throttling.
Free
150
Premium
2 400
Overdrive
above M
Free: 30% of your PC's max, between 50 and 150 KPS. Premium: up to your PC's max, plus Overdrive with a warning. Recalibrate any time.
INPUT LABIDLE
Sent0
Accepted by Windows0
Efficiency—
Hold F to run the demo.
Input Lab
See what actually
gets through.
Your selected speed is only half the story. Input Lab shows what a3ths sent, what Windows accepted, and how efficiently your system handled it.
Curve editor
Draw how your speed
ramps up.
Multi-point curve: X is time, Y is KPS. Drag points, double-click to add or remove. It's the same curve as in the app's Curve tab, and the demo runs on it.
Appearance
Black. White.
Alive.
The lamp cursor lights up nearby borders and the grid, and the background reacts to every keypress. Everything is drawn on the GPU in one frame, with an FPS cap and a pause when minimized.
SITE BACKGROUND — TRY IT
Premium unlocks every background in the app, plus lamp settings: size, brightness, trail.
Free & Premium
Free is honest.
Premium has no ceiling.
FeatureFreePremium
Speed30% of your PC, 50–150 KPSUp to your PC's max + Overdrive
Delivery enginesClassicAdaptive Flow, Frame Sync, Classic
Curve editor—Multi-point, presets, jitter
Start & spam keysAny key or mouse buttonAny key or mouse button
Lamp cursor✓✓ + size, brightness, trail
Backgrounds1 basicAll: grid, cubes, waves, dust, snow
Input reactionsBasicAll effects + intensity
Profiles1Unlimited
Input LabKPS counterSent / accepted / efficiency
Stream proof, watermark—✓
Click & typing sounds—✓
Config import / export—✓
Discord statusAlways on✓, can be turned off
Pricing
Cheaper than
you think.
Every plan unlocks full Premium — only the duration differs. Not sure? Grab the 24-hour trial, once per PC.
7 days
$0.99
Try it out
Buy30 days
$2.49
≈ $0.08 a day
Buy90 days
$5.99$7.47
−20% vs monthly
BuyLifetime
$12.99
One payment, all future updates
BuyRight now keys are issued manually: open a ticket in our Discord, pay, and get your key.
FAQ
Questions
What is a3ths?
An external app for Windows 10/11 that spams one key or mouse button of your choice in Hold or Toggle mode. You pick both the start key and the spam key. It doesn't inject into games and works through standard Windows input.
Why is my Free limit 150 and my friend's lower?
The Free limit is 30% of the maximum your PC showed during calibration, within 50–150 KPS. A weaker PC has a lower maximum, so its limit is lower too.
How do I get a key?
Join our Discord, open a ticket and pick a plan. After payment you'll get a key to enter in the launcher.
Is the key tied to my PC?
Yes, a key works on one PC. If you changed hardware or reinstalled Windows, contact support and we'll reset the binding.
Can I use it in any game?
Rules differ between games. Check the rules of your game or server before using it.