RhythMic vs The Sandglass
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RhythMic
Transform your device into a real-time music visualizer that reacts to ambient sound. Choose from over 30 themes, sync with multiple devices, and even use your Apple Watch as part of the light show. Perfect for parties, content creation, or enhancing your listening experience.
- Real-time music visualization
- 30+ premium visual themes
- Multi-phone Wi-Fi sync
- Apple Watch sync
- Beat-synced flashlight strobe
- Live Activity on Lock Screen
- Screen recording mode
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MAKE THE ROOM MOVE WITH THE MUSIC RhythMic turns nearby sound into a full-screen light show. Pick a color, animated pattern, or occasion theme, then watch every beat reshape the screen in real time. NEW: HALLOWEEN NIGHT Glowing jack-o'-lanterns, bats, ghosts, and a full moon react to every beat — perfect for Halloween parties. Premium is a one-time lifetime purchase with Family Sharing. ADAPTIVE SOUND ENGINE RhythMic listens through your microphone and continuously adapts to the room. Recalibrate at any time, adjust sensitivity manually, or let Adaptive Mic Sensitivity keep the response balanced as the music changes. BASS, VOCALS, AND TREBLE Real-time frequency analysis separates low, mid, and high energy. Bass can drive powerful pulses, vocals can animate the center of the scene, and treble can add detail and sparkle. You can also tune Bass Response in Settings. 50 MUSIC-REACTIVE VISUALS Explore solid and dual colors, flowing gradients, glowing ripples, particles, waveforms, equalizer shapes, tri-band visuals, and celebration scenes for birthdays, weddings, graduation, New Year, Ramadan, Eid, and more. LIVE PERFORMANCE Build a scene timeline, choose manual or timed transitions, set each scene's intensity, reorder the running show, and control the result from one dedicated performance workspace. SYNC THE ROOM Host a secure multi-phone party over local Wi-Fi so nearby iPhones follow the same colors. Extend the show to Apple Watch, the flashlight strobe, Live Activities, and a connected external display when supported. CREATOR RECORDER Record the screen alone or combine it with the front camera, back camera, or both cameras at once on supported devices. Choose microphone audio, trim the result, frame it for 9:16, 1:1, or 16:9, and export a ready-to-share video. DESIGNED FOR THE MOMENT • Automatic mode keeps visuals moving without music • Double-tap the on-screen label to leave a show • Triple-tap to reveal the sensitivity control • Optional haptic beat feedback • Inverted visuals and safety controls • English, Arabic, Spanish, Hindi, Simplified Chinese, French, German, Italian, and Portuguese PREMIUM, ONCE Unlock every premium visual and creator feature with one lifetime purchase. No subscription. RhythMic is made for parties, DJs, celebrations, content creators, and anyone who wants to turn sound into light.
The Sandglass
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The Sandglass turns your Apple Watch into a living hourglass. Thousands of sand grains fall through a curved glass neck, driven entirely by the real tilt of your wrist. Pick up your watch, tip it sideways, flip it upside down — the sand responds instantly, flowing in whichever direction gravity pulls. Spin the Digital Crown to flip the hourglass. Clockwise rotates it one way, counter-clockwise the other. Watch the grains tumble, settle, and start falling all over again. That's it. No timer. No score. Just sand. **How it works** · Tilt your wrist to redirect the flow of sand in any direction · Spin the Digital Crown clockwise or counter-clockwise to flip the hourglass · Thousands of individual grains simulated in real time using cellular automaton physics · Each grain accelerates under gravity, piles up naturally, and slides down curved walls **Designed for Apple Watch** · Runs entirely on-device — no iPhone, no internet, no account · Optimised for the Apple Watch display: 3D glass with thousands of falling grains behind it
Screenshots
Verdict
The clearest difference is in-app purchases: The Sandglass at none against RhythMic's 2. The Sandglass also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (10.0 vs 15.0). On price, ads and device support there is nothing between them.
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. RhythMic sells 2 one-off in-app purchases. The Sandglass asks for nothing beyond the download.
RhythMic ships an update every 2 months, The Sandglass every 3 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.
| Parameter | RhythMic | The Sandglass |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod, Apple Watch |
| Requires iOS | 15.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Mohammad sulaiman | Shota Hori |
In-app purchases
RhythMic
- RhythMic Premium$3.99
- RhythMic Premium 2$7.99
The Sandglass
No in-app purchases









