The internet speed limiter that runs on your phone, not in the cloud.
Pausix is a local-VPN bandwidth limiter for Android. Cap your connection, simulate slow networks, and throttle internet speed for app testing — without sending your traffic to a remote server.
- Min limit
- 64 kbps
- Presets
- 6
- Trackers
- 0
Slow 3G
384 kbps down · 128 kbps up
Live download
312 kbps
Android: Available. iOS: In progress.
Why a speed limiter
The internet does not always cooperate.
From spotty subway Wi-Fi to overloaded coffee-shop hotspots, real-world networks are messier than your dev machine. A reliable internet limiter lets you bring those conditions into your own pocket — on purpose.
Apps that never see slow networks
Your staging environment runs on fibre. Your users do not. Without a bandwidth limiter, you miss the bugs that only surface on a real Slow 3G connection.
Burning through mobile data
Background sync, autoplay video and over-eager updates can quietly eat through a data plan. A network speed limiter helps you put a hard ceiling on your phone’s bandwidth usage.
No repeatable throttling for QA
Manual airplane-mode toggling is not a test plan. QA teams need a speed limiter app that produces the same conditions on every run.
Privacy concerns with “limiter” apps
Many bandwidth tools route traffic through a remote proxy. Pausix takes the opposite approach: everything stays on-device, with no remote servers and no analytics.
Features
A practical bandwidth limiter, built with honest engineering.
Pausix focuses on doing one thing well: capping your device’s effective network speed in a way you can actually measure.
Realistic network presets
One-tap presets for Dial-up, EDGE, Slow 3G, Fast 3G, LTE Light and Broadband — calibrated to mimic real-world conditions for QA testing and app validation.
Custom speed limits
Set your own download and upload caps in kbps, from 64 kbps up to 1,000,000 kbps. Adjust limits on the fly without restarting the session.
Local VPN-based limiter
Pausix uses a local VPN-style approach: a token-bucket rate limiter runs on-device through the operating system VPN APIs. No remote servers are involved.
Offline-first by design
Pausix works entirely on your device. No account, no cloud sync, no remote proxying — traffic does not leave your phone through a third party.
Privacy-respecting
No analytics, no advertising SDKs, no tracking. Pausix does not log domains, IP addresses, packet contents or per-app traffic records.
Live verification & stats
A built-in verification screen compares the measured throughput against the configured limit so you can see the throttling actually working in real time.
Built-in network presets
Calibrated to mimic common mobile network conditions. Actual speeds may vary depending on device, OS, network and app behavior.
| Preset | Download | Upload | Best for |
|---|---|---|---|
| Dial-up | 64 kbps | 64 kbps | Stress-test app behavior on extremely constrained links. |
| EDGE | 236 kbps | 118 kbps | Legacy 2.75G mobile networks still common in remote areas. |
| Slow 3G | 384 kbps | 128 kbps | Common QA baseline for testing loading states and timeouts. |
| Fast 3G | 1,500 kbps | 750 kbps | A reasonable mid-range mobile connection. |
| LTE Light | 5,000 kbps | 2,000 kbps | Light 4G LTE conditions in busy areas. |
| Broadband | 25,000 kbps | 5,000 kbps | Typical home or office broadband baseline. |
How it works
A local VPN-style approach — without the privacy trade-offs.
Pausix uses your operating system’s VPN APIs purely as a hook to rate-limit packets on your own device. There is no remote server, no payload inspection, and no traffic relayed through a third party.
- 1
Pick a preset or set a custom limit
Choose a built-in network profile such as Slow 3G, or enter your own download and upload speed in kbps. You can change direction (download, upload, or both).
- 2
Start the local VPN limiter
Pausix asks the operating system for permission to run a local VPN. No traffic is sent to any remote server — the VPN is used purely as a transport for the on-device throttling engine.
- 3
Browse, test, and verify
Use your apps normally. The verification screen shows live bps and a within / above verdict against your configured limit, so you can see throttling work in real time.
- 4
Stop anytime
Tap stop and the local VPN session is torn down immediately. Your network behavior returns to normal with no leftover configuration.
On Android, the throttling engine applies a real token-bucket rate limit to IPv4 UDP and TCP payload bytes; IPv6 and ICMP are dropped while the engine is active. iOS support is in progress, and the current iOS build is session-only.
Use cases
Who Pausix is for.
From developers who need to throttle internet speed for testing, to travelers who want to manage bandwidth, Pausix fits any workflow that benefits from a predictable network cap.
Developers testing slow networks
Reproduce skeleton states, retry logic and request timeouts on real devices without waiting for poor reception. A speed limiter app is faster than driving to a dead zone.
QA testers validating apps
Run regression and acceptance tests against deterministic network conditions. Pair Pausix with your test plan for repeatable bandwidth throttling scenarios.
Travelers and data-conscious users
Cap your phone’s connection so streaming and background services do not burn through limited data plans. A network speed limiter helps you stay in control.
Network behavior simulations
Demonstrate how a product behaves under network throttling — useful for support engineers, technical writers and product teams running live demos.
FAQ
Questions about speed limiters, answered.
Plain answers about internet speed limiters, bandwidth throttling and how Pausix uses a local VPN approach.
What is an internet speed limiter?
An internet speed limiter is a tool that caps the rate at which data flows over a network connection. On a phone, an internet speed limiter app like Pausix lets you choose a maximum download and upload speed so the device behaves as if it were on a slower network.
How does a bandwidth limiter work?
A bandwidth limiter applies a rate-limiting algorithm — typically a token bucket — to the packets flowing through a network interface. Each interval, a fixed number of bytes is allowed through; everything else waits or is dropped. The result is a steady, predictable cap on throughput.
Can I limit internet speed on my phone?
Yes. On Android, Pausix uses the system VpnService API to set up a local VPN and apply a real token-bucket rate limit to IPv4 UDP and TCP traffic on-device. iOS support is in development. No remote proxy is required and your traffic is not sent through a third-party server.
What is a local VPN speed limiter?
A local VPN speed limiter uses the operating system’s built-in VPN APIs only as a transport — the VPN endpoint lives on your own device. There is no remote server, no tunneling to a data center and no payload inspection. Pausix uses this approach to shape outbound traffic while keeping everything local.
Is Pausix a real VPN?
No. Pausix is not a privacy VPN. It uses the VPN permission your operating system provides only as a hook to intercept and rate-limit your own traffic on-device. It does not route your data through any external server and it does not change your IP address.
Does Pausix send traffic to external servers?
No. Pausix runs entirely on your device. The local VPN session is used as a transport for the on-device throttling engine. Your packets are not relayed through any Pausix-operated server, and Pausix does not collect analytics or telemetry.
Can I throttle internet speed for testing?
Yes. Pausix is designed to help developers and QA teams reproduce slow-network conditions on real devices. Pick a preset like Slow 3G or set a custom kbps limit, start the limiter, and run your app against deterministic network throttling.
Is network throttling useful for QA testing?
Network throttling is one of the most valuable techniques in mobile QA. It surfaces missing loading states, race conditions, retry bugs, and unrealistic timeouts that only appear under realistic mobile network conditions. A speed limiter app makes that workflow repeatable on real hardware.
Privacy
Local-first by design.
Pausix is built to throttle your traffic without ever seeing it. We do not collect analytics, we do not relay packets through any server we operate, and our policies are written with GDPR-aware privacy principles.
On-device by default
Pausix runs entirely on your phone. No accounts, no cloud sync, no remote proxying.
No tracking, no analytics
There are no advertising SDKs, no third-party analytics and no telemetry uploads from the app.
Honest engine status
Pausix is upfront about what the throttling engine can and cannot do on each platform. If a feature is unavailable or in development, the app says so plainly.
GDPR-aware policies
Our Privacy Policy is written with GDPR-aware principles — including data minimisation, lawful basis and clear user-rights sections.
We avoid blanket claims like “fully GDPR compliant” or “military-grade privacy”. Speed results may vary depending on device, OS, network and app behavior.
Ready to put a ceiling on your network?
Install Pausix and start using it as a local-VPN bandwidth limiter in under a minute. No account required.
Questions? Email godomainz@gmail.com