Rithmer: Interval, Focus Timer

Shape time your way. Rithmer is a HIIT, Pomodoro, and breathwork timer that adapts to your focus, training, and recovery — 100% offline, one-time unlock.

Rithmer is a powerful HIIT, Pomodoro, and breathwork timer — a rhythm engine that helps you shape time that moves with you.

Whether you’re training through HIIT or Tabata, building focus with Pomodoro, unwinding through breathwork, or finding stillness in meditation, Rithmer adapts to how you move, think, and rest. It helps you build structure when you need discipline, and calm when you need space. Minimal by design. Powerful by intent.

BUILD YOUR OWN RHYTHM

Rithmer gives you total creative freedom to design custom sessions that fit your flow — from intensity to calm, from seconds to hours. Each session can be built block by block, combining Work, Rest, Inhale, Hold, and Exhale in any sequence. Loop them infinitely, or evolve them automatically using progressive timing to grow with every repetition. • Unlimited blocks & loops – build complex or minimalist routines without restriction. • Smart progression control – automatically increase or decrease block durations with every loop for gradual overload or extended breathwork. • Session-level settings – control cue sounds, tone, volume, and voice announcements per session. • Custom categories – label sessions as Workout, Focus, Mindfulness, to track your balance across movement and rest. • Clear, adaptive visuals – large typography and color-aware design for visibility in motion, training, or meditation.

From sprints to stillness, every sequence becomes a personal rhythm — designed by you, guided by Rithmer.

FEEL THE TIME — DON’T JUST COUNT IT

Rithmer is designed to fade into the background and let your rhythm take over. Subtle tones and haptics mark transitions without breaking focus. Voice announcements help you stay in sync without looking at the screen. Focus Mode keeps everything visible and distraction-free while you move, breathe, or think deeply. • Refined audio cues – choose subtle or strong tones to mark block transitions and loops. • Voice guidance – optional spoken cues for time remaining or block names keep your hands free and your mind engaged. • Focus Mode – keeps your display awake so your rhythm is uninterrupted. • Offline by design – no sign-ins, ads, analytics, or data collection. Everything stays on your device. • Accessibility ready – optimized for VoiceOver, clear contrasts, and haptic feedback so every user can stay in rhythm.

Rithmer is built for precision and calm — for anyone who works, trains, or breathes with intention.

GO PREMIUM — ONE-TIME UNLOCK

Upgrade once and unlock the full creative power of Rithmer. No subscriptions. No hidden costs.

Premium includes: • Unlimited blocks and loops • Progressive duration adjustments per loop • Voice announcements and advanced cue options • Templates and reusable presets • Unlimited reports and session analytics

A single one-time purchase transforms Rithmer into your personal timing studio — precise, flexible, and completely offline.

BUILT FOR EVERY KIND OF FOCUS

For athletes and trainers — a precision interval timer that grows with your strength. For students and creators — a focus companion that brings flow to your work. For breathers and meditators — a quiet, reliable guide that holds rhythm without distraction. For everyone balancing intensity and stillness — one app that adapts to every phase of your day.

Rithmer unites movement, focus, and calm into one continuous experience. It’s not about counting down time. It’s about feeling it — and shaping it deliberately.