Sigfre vs Pure Phase
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Sigfre
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Most people leave their mental performance to chance. Sigfre doesnβt. Built for entrepreneurs, creators, and high performers who optimize everythingβSigfre is the premium brainwave audio engine that lets you engineer exactly where your mind needs to be, whenever you need to get there. No presets you can't control. No headphones required. No ceiling on what you can build. THE SIGFRE METHOD Every session is built on precision monaural and isochronic tones. Unlike standard binaural beats, which completely fall apart the second you take your headphones off, monaural and isochronic technology works flawlessly through any speaker. At your desk. In your car. On your studio monitors. No headphones. No limitations. FIVE BRAIN STATES. TOTAL CONTROL. You don't have one mode. Neither does Sigfre. Delta: Deep, restorative sleep and physical recovery Theta: Subconscious access, creativity, and meditation Alpha: Calm, sustained focus and stress dissolution Beta: Sharp thinking, productivity, and active output Gamma: Peak cognition, pattern recognition, expanded awareness Map your sessions to your day. Sleep deeper. Wake sharper. Work longer. Create freer. BUILD YOUR SESSION Access the full modular mixing consoleβbecause the highest performers don't settle for someone else's defaults. (Short on time? Tap into Guided Goals for pre-engineered neural states tailored for Relax, Peak, Energy, Sleep, or Focus). Select your Brainwave State. Layer in Ambience: Ground your mix with high-definition, organic soundscapes like Ocean, Rainforest, Stream, and Thunder. Add Solfeggio Frequencies: Layer in specific acoustic tuning (like 852 Hz or 963 Hz) for resonance and energetic alignment. Activate the Custom AI Subliminal Layer. CUSTOM AI SUBLIMINALS This is what separates Sigfre from every other audio app on the market. The Subliminal Creator is your ultimate custom engine. Type in your exact goal, select from premium, studio-grade AI voices, and generate limitless personalized affirmations. Sigfre weaves this audio directly into your mix as an undetectable layerβplaying at a level your conscious mind doesn't process, but your subconscious does. You've done the affirmations. You've read the books. You've built the vision board. The Custom AI Subliminal Layer runs that process on autopilot while you work, sleep, and focus. FREE VS. SIGFRE PRO Free: Curated Guided Goal sessions across neural states No headphones required (True Monaural & Isochronic audio) Works flawlessly on any speaker or device Sigfre Pro β $9.99/month or $69.99/year (Save 42%): Unlimited Custom AI Subliminal Generation Full modular audio mixing console Unlimited saved custom mixes All Solfeggio frequency layering Cloud Sync Your brain is always running. Sigfre makes sure it's running the right program. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Pure Phase
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Pure Phase uses synchronized light, sound, and breath to guide you into focused, calm, or sleep states β without subscriptions, accounts, narration, or bloat. Tap to begin. Hold to tune. That's the whole interface. THREE SCIENCE-GROUNDED STATES FOCUS β 40Hz gamma frequency, synchronized light and isochronic audio. Associated with peak mental clarity. The subject of ongoing clinical research at MIT and elsewhere. CALM β 10Hz alpha frequency. One of the most consistently documented frequencies in relaxation and stress research. Ideal for unwinding, creative work, or transition between tasks. SLEEP β 2Hz delta frequency. Use with eyes closed and torch enabled. The flashlight pulses at the session frequency through your eyelids β no screen required. BREATHE β GUIDED BREATHWORK A fourth mode with no flicker β just a breathing ring that expands and contracts to pace your breath. Choose from Coherence (6 breaths per minute, the HRV resonance frequency), 4-7-8, Box breathing, or Slow Wave. Or build your own pattern in Advanced settings. ISOCHRONIC AUDIO A warm audible carrier tone pulses at the brainwave frequency, synchronized frame-by-frame with the visual flicker. Underneath, a procedurally generated ambient texture β pink noise, brown noise, or sustained drone β provides continuity and masks environmental sound. Everything is generated on-device. No audio files. DRIFT & BLOOM New psychoacoustic modes for headphones. Three synthesis layers create auditory depth and slow movement through pure tones β a breathing carrier, a drifting stereo field, and optional harmonic shimmer. DRIFT pairs them with a pure black canvas. BLOOM pairs them with a slow generative visual field that breathes and shifts color in sync with the audio. Non-stroboscopic β accessible to anyone who can't tolerate the entrainment modes. ADVANCED For users who know what they want: Theta, SMR, PRISM, and Void states, a custom Hz slider from 0.5 to 40Hz, custom breath timing with independent inhale, hold, and exhale controls, and carrier frequency selection. Clearly labeled as exploratory. PURE PHASE IS FREE No subscription. No account. No guided narration. No content library. No streak tracking. No ads. No data collection of any kind. Everything runs on your device. Pure Phase uses rapid rhythmic light pulses. Do not use if you are photosensitive or have a history of epilepsy or seizure disorders. Always use in a safe, seated, stationary environment. Not a medical device.
Screenshots
Verdict
The clearest difference is in-app purchases: Pure Phase at none against Sigfre's 2. Pure Phase also leads on update cadence (every 3 days vs weekly). Sigfre's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Sigfre sells 2 in-app purchases, starting at $9.99 per month. Pure Phase asks for nothing beyond the download.
Sigfre ships an update weekly, Pure Phase every 3 days. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.
| Parameter | Sigfre | Pure Phase |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 3 days β better |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 15.1 β better | 17.0 |
| Further details β not scored | ||
| Size | 332 MB | 4 MB |
| Age rating | 4+ | 17+ |
| Developer | Tyler Fuller | Mark Friedlander |
In-app purchases
Sigfre
- Sigfre Pro Monthly$9.991 Month
- Sigfre Pro Annual$69.991 Year
Pure Phase
No in-app purchases









