E vs Signal Scope Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
E
Easily transfer photos and videos from your phone to an electronic badge for display via Bluetooth. The app accesses your Bluetooth, photos, and camera to facilitate this transfer, keeping your data local to your device and badge.
- Bluetooth photo and video transfer
- Display content on electronic badges
- Access to phone's photo album
- Camera function integration
- Data stored locally
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You can easily transfer photos and videos from your phone to your electronic badge for display via Bluetooth through the app. Therefore, the APP will use your phone's Bluetooth function and need to access your photo album and call the camera function in order to transfer videos and photo albums to the electronic badge. But we will not upload your photos, videos, and other data to the server. The data will only be retained in your electronic bar and app. I hope our app and electronic badge can bring you a relaxed and enjoyable experience.
Signal Scope Studio
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Signal Scope Studio combines a dual-channel oscillator, an output signal simulator, a live microphone oscilloscope and spectrum analyzer, and a stereo decibel meter in one audio toolkit. DUAL SIGNAL GENERATOR • Set sine, square, triangle, falling sawtooth, or white noise independently for LEFT and RIGHT • Adjust frequency from 20 Hz to 20 kHz and volume from 0 to 100% with 270-degree dials. Frequency also supports numeric entry • Adjust left and right frequency and volume independently, or link them while preserving the ratios at the time linking is enabled • Output different frequencies from the left and right channels to produce beats and other effects OUTPUT SIGNAL SIMULATOR • Linearly sum LEFT + RIGHT internally and display the waveform and spectrum together • Adjust Auto Trigger, freeze/resume, vertical and horizontal zoom, and refresh interval • Control frequency range, spectrum sensitivity, and FFT resolution with dials or pinch and pan gestures • Save high-resolution graphs with a dark navy background, white text, and green traces to Photos WAVESCOPE • Display the time-domain waveform and frequency spectrum of microphone input together in real time • Use Auto Trigger, freeze display, pinch zoom, and a movable settings window • Open Dual Signal Generator within the app and measure the actual sound emitted by the same device DECIBEL METER • Display relative microphone input levels on analog-style VU meters in real time • Automatically detect stereo or mono input: two separate meters for the left and right channels in stereo, or one meter in mono • Use PEAK indicators to spot brief sounds near the maximum input level • Save a calibration offset to match a commercial decibel meter MORE • All features are available for seven days from the original download date. After the trial, Dual Signal Generator and Decibel Meter remain free to use; a one-time purchase lets you continue using WaveScope. • Includes detailed offline manuals in Japanese, English, and French. • Supports iPhone and iPad in portrait and landscape. PLEASE NOTE • Measurements depend on the device and environment. • This app is intended for education, experiments, and general audio checks. It is not a substitute for calibrated instruments, certified sound-level meters, or medical devices.
Screenshots
Verdict
The clearest difference is in-app purchases: E at none against Signal Scope Studio's 1. E also leads on iOS requirement (13.0 vs 26.2). Signal Scope Studio's advantage is update cadence (every 9 days vs every 3 weeks). 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. Signal Scope Studio sells 1 one-off in-app purchase. E asks for nothing beyond the download.
E ships an update every 3 weeks, Signal Scope Studio every 9 days. Both last shipped on October 24, 2026.
| Parameter | E | Signal Scope Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 1.5 (8 ratings) — better | — |
| Positive reviews | 5.3% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 28 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | guang dong wan long zhi neng dian zi you xian | Koji Hasegawa |
In-app purchases
E
No in-app purchases
Signal Scope Studio
- WaveScope Full Access$9.99









