Sandbox Draw vs Bluetooth Microphone app
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sandbox Draw
Experience a unique drawing app that simulates soft, sunlit sand. Create grooves with pressure-sensitive input and feel haptic feedback. Discover hidden colorful patterns beneath the surface and easily share your creations.
- Pressure-sensitive sand drawing
- Real-time haptic feedback
- Hidden color patterns
- One-tap refresh
- One-tap sharing
- No ads or data collection
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Sandbox Draw turns your iPhone into a tray of soft, sunlit sand. Drag a finger and the surface carves into a real groove with a shadow along its low edge — not a painted-on line. Press harder for a deeper groove. Press hard enough and the device responds with continuous haptic feedback that tracks your stroke. Dig deep enough and a colorful pattern bleeds through from underneath, different every session. Tap the refresh button to smooth the sand flat and start over with a brand-new color world below. Tap the share button at any moment to save or send your drawing. Features - Real-time pressure-sensitive sand drawing, 120 Hz on ProMotion devices - Haptic feedback on the hardest presses - A surprise of color revealed at the bottom of every deep groove - One-tap refresh, one-tap share to Photos, Messages, AirDrop, and more - No accounts, no ads, no data collection A small, quiet app. Draw, smooth, draw again.
Bluetooth Microphone app
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Turn your iPhone into a professional wireless microphone for any Bluetooth speaker. U-MIC PRO is the microphone app that actually works. Connect your iPhone to any Bluetooth or AirPlay speaker and start speaking, singing, or performing live — instantly. WHETHER YOU'RE A SINGER, SPEAKER, OR PERFORMER - Use your iPhone microphone with any Bluetooth speaker - Sing karaoke over any song playing in the background - Read your script or lyrics while you perform - Transform your voice with 11 real-time voice filters - Shape your sound with EQ, reverb and autotune STUDIO EFFECTS. LIVE. - Voice Changer — Child, Deep, Robot, Stadium, Helium and more - Real-time Autotune with multiple scales - 3-band EQ with vocal presets - Reverb with 8 room presets - Echo suppression for clean live sound - Mic gain control independent of speaker volume WORKS WITH EVERYTHING - Any Bluetooth speaker or soundbar - AirPlay and HomePod - Wired headphones and speakers - iPhone built-in microphone - Wired microphone input NO SETUP. NO DELAY. Connect your speaker, tap the switch, and your voice comes through live. No accounts. No cloud. Everything works on your device. U-MIC PRO. Your voice. Any speaker. Privacy Policy: https://redvanta.net/umic/privacy Terms of Service: https://redvanta.net/umic/terms
Screenshots
Verdict
The clearest difference is in-app purchases: Sandbox Draw at none against Bluetooth Microphone app's 2. Sandbox Draw also leads on update cadence (daily vs weekly) and iOS requirement (15.0 vs 17.6). 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. Bluetooth Microphone app sells 2 in-app purchases, starting at $4.99 per 7 days. Sandbox Draw asks for nothing beyond the download.
Sandbox Draw ships an update daily, Bluetooth Microphone app weekly. Both last shipped on October 31, 2026.
| Parameter | Sandbox Draw | Bluetooth Microphone app |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Daily — better | Weekly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Dox2A Labs LLC | Redvanta Software Ltd |
In-app purchases
Sandbox Draw
No in-app purchases
Bluetooth Microphone app
- U-MIC Pro7 Days trial$4.997 Days
- U-MIC Pro$23.991 Year
Questions
Is Sandbox Draw free?
Is Bluetooth Microphone app free?
Do Sandbox Draw or Bluetooth Microphone app have ads?
Which is updated more often, Sandbox Draw or Bluetooth Microphone app?
Other comparisons
