AIS eMemo vs Decibel
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
AIS eMemo
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This is a system to help you improve your working performance and makes the documentation approval and storage simple. It supports all purposes of document approval within organizationβs departments such as news announcement, explanation, reporting, and expense approval which depends on the type of work to communicate or notice.
Decibel
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# Decibel Meter Pro: AI Sound **Decibel Meter Pro: AI Sound** is an all-in-one acoustic engineering and noise measurement suite. Engineered for sound technicians, workplace safety inspectors, environmental researchers, acoustic enthusiasts, and everyday users, this app transforms your device into a certified-grade sound level meter (SPL), occupational noise dosimeter, AI sound classifier, camera noise evidence recorder, and precision tone generator. --- ### Precision Decibel Meter & SPL Analyzer Measure environmental sound pressure levels (SPL) in real time with high accuracy: - **Instantaneous Sound Pressure**: Real-time dB readings with an ultra-responsive radial gauge (0 to 120+ dB). - **Acoustic Readouts**: Instant, Minimum (Min), Maximum (Max), and Average (Avg) decibel tracking. - **Live Waveform Chart**: Track sound level variations over time with dynamic scrolling waveform graphs. - **Hardware Calibration**: Adjust microphone sensitivity with custom Β±dB calibration offsets. - **Reference Scale**: Compare measurements against real-world references (30 dB to 140 dB). ### Occupational Noise Dosimeter (OSHA & NIOSH) Protect hearing and maintain workplace compliance with standard dosimeter monitoring: - **Standards Presets**: Switch between **NIOSH REL** (85 dB / 3 dB), **OSHA HC** (90 dB / 5 dB), and **OSHA PEL**. - **Real-Time & Projected Dose %**: Monitor live noise dose accumulation and projected 8-hour daily exposure. - **TWA & Leq Metrics**: Calculate accurate Time-Weighted Average (TWA) and Equivalent Continuous Sound (Leq). - **Hearing Risk Alerts**: Real-time color-coded safety guidance (Safe, Action Level, Hazardous). - **Session History**: Save, review, and manage completed dosimeter sessions with exposure data. ### AI Sound Recognition & Classifier Powered by on-device Edge AI machine learning (TensorFlow Lite / YAMNet): - **Real-Time Sound Recognition**: Identifies speech, sirens, alarms, dogs, machinery, music, and nature. - **Confidence Scoring**: Displays real-time detection probability percentages for every sound event. - **Event Timeline**: Logs detected environmental sounds chronologically with exact timestamps. - **100% On-Device Privacy**: All neural network processing runs locallyβzero audio is sent to the cloud. ### Camera Sound Overlay & Visual Evidence Document noise violations, workplace audits, and neighborhood sound levels with photo evidence: - **Live Decibel HUD**: Real-time dB, Peak dB, Min/Max/Avg, and timestamps overlaid on viewfinder. - **Watermarked Capture**: Save calibrated photo evidence with embedded sound stats to gallery. - **Dual Camera**: Switch seamlessly between front and rear cameras for handheld and site audits. ### Audio Frequency Generator (20 Hz β 20 kHz) Generate pure sine wave frequencies across the entire audible spectrum: - **Full Spectrum Range**: Smoothly sweep from 20 Hz sub-bass to 20,000 Hz treble. - **Gesture Controls**: Adjust frequencies with vertical drag gestures and quick presets (Low, Mid, High). - **Acoustic Testing**: Perfect for speaker testing, subwoofer tuning, room acoustics, and tinnitus relief. --- ### Privacy & Battery Efficiency - **Zero Cloud Recording**: Audio is processed in memory only; never recorded or shared. - **Optimized Performance**: Native audio processing with minimal battery drain. - **Adaptive Themes**: Clean Light & Dark modes for high contrast in all lighting. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: AIS eMemo at none against Decibel's 3. AIS eMemo also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Decibel's advantage is update cadence (every 2 days vs every 2 months). On price 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. Decibel sells 3 in-app purchases, starting at $5.99 per 7 days. AIS eMemo asks for nothing beyond the download.
AIS eMemo ships an update every 2 months, Decibel every 2 days. The most recent releases landed on October 12, 2026 and October 31, 2026 respectively.
| Parameter | AIS eMemo | Decibel |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 days β better |
| Ads | No β better | Yes |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 β better | 15.0 |
| Further details β not scored | ||
| Size | 19 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | Mimo Tech | IMAD EDDINE EL QSIMI |
In-app purchases
AIS eMemo
No in-app purchases
Decibel
- Bd Meter Premium Weekly$5.997 Days
- Bd Meter Premium Monthly$9.991 Month
- Bd Meter Premium Yearly$14.991 Year









