Tier1Suite

Yes. The download is free and stays free — no trial period, no time limit, no account, and no card required. Free includes timer resolution with per-game Auto Mode, one-click stretched and custom resolution, 20 of the 33 tweaks in the catalog, system restore points and revert-all, and the Advisor's top recommendation. There is one optional upgrade, Tier1Suite Pro, which is a $4.99 one-time purchase — not a subscription — and the free version keeps working whether or not you ever buy it.

Yes. Tier1Suite uses no code injection, no process hooking, and installs no kernel driver — it never touches a running game. Every change is made through documented Windows APIs (registry values, power-plan settings, display/EDID and GPU driver calls), which is the same class of change as adjusting Windows Settings or your GPU control panel yourself.

Yes, and that is built into every entry rather than bolted on. Each tweak shows exactly what it changes and its risk level before you apply it, and has a working one-click revert. Tier1Suite takes a system restore point before applying changes, there is a revert-all button for everything at once, and stretched resolution has a 15-second "keep these settings?" countdown that puts your display back automatically if the screen goes wrong.

Honestly: it mostly improves input latency and frame pacing rather than raw average FPS — smoother 1% lows and inputs that register faster, not a bigger number in the corner. That is why the app measures on your machine instead of promising in advance: the built-in latency benchmark lets you compare before and after, and where a figure genuinely cannot be measured yet the app says "not measured" instead of inventing one.

Yes. Stretched and custom resolution with full-panel GPU scaling works on NVIDIA, AMD and Intel. Timer resolution, the tweak catalog, the latency monitor and the Advisor are GPU-agnostic and work on any supported machine. The one known gap is custom-resolution creation on some hybrid laptops where the integrated GPU owns the panel.

Windows 10 or 11, 64-bit. Tier1Suite installs via a signed MSI and is fully self-contained — there is no separate .NET runtime or other prerequisite to install. The app launches without admin rights, so browsing the catalog and every read-only system check run with no UAC prompt at all; applying a tweak that needs elevation asks for it only at that moment.

Pro unlocks the remaining 13 tweaks in the catalog (power plan, core parking, C-states, HAGS, MPO, VBS/memory integrity and more), unlimited per-game profiles with auto-switching, the full ranked Advisor report, and Tier1Monitor's latency benchmark and scheduling-latency monitor. It is a $4.99 one-time purchase covering 3 PCs, with future updates included and no subscription. If it isn't for you, there's a full refund within 14 days.

Install Tier1Suite: it contains both of them in full, free, and is where all new work now goes. You do not have to uninstall the standalone versions first — they can sit alongside the suite — but there is no reason to keep both. If you bought Tier1Stretch Pro, that licence key activates Tier1Suite Pro at no extra cost; you will never be asked to pay twice for the same features.