6th Mind vs Sol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
6th Mind
This app offers Audio-Visual Entrainment (AVE) therapy to help alleviate symptoms of depression, anxiety, insomnia, and burnout. It combines binaural beats, isochronic tones, and stroboscopic light, with options for guided protocols or flexible session choices. Enhanced features include a headset mode for deeper immersion and eyes-open sessions.
- Audio-Visual Entrainment (AVE) therapy
- Binaural beats, isochronic tones, stroboscopic light
- Guided personalized protocols
- Flexible session selection
- Headset Mode for enhanced immersion
- Eyes-open sessions
- Offline session bundles
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Get relief from depression, anxiety, insomnia and burnout with AVE (Audio-Visual Entrainment) - a clinically-based approach combining binaural beats, isochronic tones, and stroboscopic light. Headphones recommended for the strongest effect; sessions still work without them. Built on data from 1000+ real therapy sessions. • FREE - No ads, no subscription needed • Clinically-based - Built on real therapy session data • NEW Headset Mode - Use a low-cost 3D-printable headset to turn your phone's screen into a full-field light source for deeper, less distracting sessions • NEW Eyes-open sessions - Watch the patterns directly, with gentle pre-session animations • NEW Mental 6-packs - Themed bundles of six sessions, ready to play offline • NEW Enhance your routine - Add 40 Hz mental clarity or better-sleep sessions to your day • Flexible use - Follow personalized protocol or choose any session • Your pace - 11-minute full sessions or 6-minute short versions • Science-backed AVE therapy - Combines light and sound • Complements traditional treatment - Use alongside therapy or medication • Privacy-first - Your data stays private HOW IT WORKS: Two ways to use the app: GUIDED PROTOCOL: • Complete initial assessment questionnaire • Receive personalized 15-day therapy protocol • Follow AI-optimized session sequence • Track progress with adaptive adjustments • Optionally enhance your routine: add mental clarity (40 Hz) or better-sleep sessions, up to three sessions a day, each with its own reminder time FLEXIBLE SESSIONS: • Browse all available AVE sessions • Choose sessions based on your current needs • Select 11-minute full or 6-minute short versions • Install Mental 6-packs - themed bundles of six sessions in their own home screen section • Use anytime for quick relief or deep relaxation NEW IN VERSION 2: • Headset Mode - with a simple 3D-printable headset, your phone's screen (not just the camera flash) delivers the light, filling your field of view for stronger, less distracting sessions • Eyes-open mode with calming pre-session animations • Mental 6-packs - themed session bundles, installed with a free account and synced across your devices • Enhance your routine - extra mental clarity sessions built around 40 Hz, the gamma frequency studied for focus and memory, and better-sleep sessions that ease you down into Delta • Still free, no ads, no subscription needed WHAT IS AVE THERAPY? Audio-Visual Entrainment combines binaural beats, isochronic tones, and rhythmic light to help balance brain activity. The light reaches you through your phone's camera flash or, in Headset Mode, its screen. Headphones are recommended for the strongest effect - they add a binaural beat layer on top of the tones - but because the isochronic tones work through any speaker, sessions still work without them. Sessions follow a carefully sequenced frequency journey with gradual transitions, not a single fixed tone. Developed in a practice office with a psychotherapist and a consulting psychiatrist, grounded in data from 1000+ sessions. WHO IT'S FOR: • People with depression seeking additional support tools • Those managing anxiety and panic attacks • Anyone struggling with insomnia or sleep issues • Professionals dealing with burnout • People wanting science-backed mental wellness support WHY 6TH MIND: Science-based approach to mental wellness. Whether you're dealing with depression, anxiety, burnout, or just need help relaxing and sleeping better, our methods are grounded in psychology and refined through 1000+ sessions in our practice office. Can be used alongside traditional therapy and medication. Download free today.
Sol
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Sol Spektrum is the companion app for the Sol Spektrum photonic stimulation device by GridLights — a portable, hexagonal light with 37 high-output LEDs that flicker at precise frequencies up to 50 Hz. Pair the app with your device over Wi-Fi or Bluetooth, then shape the light: • Journeys — guided light programs that move through frequencies over time, organized by intent: Waking Dreams, Focus, Relax, Sleep, Creativity, and High Cognition. • Sequencer — build your own ordered sequences of scenes, each with its own color, brightness, speed, and duration. • Live control — adjust frequency, brightness, and color in real time, with an on-screen preview of the device as it plays. • Device & updates — manage your Sol Spektrum and install firmware updates over the air. Sol Spektrum requires the Sol Spektrum hardware device to use. Photosensitivity warning: this device produces flickering and strobing light. Do not use it if you have photosensitive epilepsy or a history of seizures, and consult a medical professional if you are unsure.
Screenshots
Verdict
6th Mind and Sol are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | 6th Mind | Sol |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (15 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 11 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 36 MB | 9 MB |
| Age rating | 17+ | 4+ |
| Developer | Sixth Technology EOOD | GridLights Company |
In-app purchases
6th Mind
No in-app purchases
Sol
No in-app purchases









