Audio Tone Generator Plus vs SkyScan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Audio Tone Generator Plus
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"Audio Tone Generator Plus" is an integrated sound signal generator app that produces various audio reference tones. It can be used in a wide range of fields as a reference sound source for audio system testing, sound tuning, hearing testing, and more. This app features four types of signal generators for producing sine wave signals, frequency sweep signals, chirp signals, and colored noise with octave band filters. - Sine Wave Generator: Generates a pure tone with high DVD-quality precision and 0.1 Hz frequency accuracy. The frequency can be set using four presets or keyboard input. - Frequency Sweep Generator: It produces a linear sine wave frequency sweep/warble signal. The start and stop frequencies can be adjusted using three presets or keyboard input. Upward and downward sweeps are possible. - Frequency Chirp Generator: It produces a very short sweep signal with linear or exponential frequency change. The start and stop frequencies can be adjusted using three presets or keyboard input. The generation time of the chirp signal and the start delay time can be adjusted. - Colored Noise Generator with Octave Band Filter: Generates white, pink, red, blue, purple, and gray noise. It can also generate 1/1 and 1/3 octave band colored noise with a user-configurable octave band filter. Multiple selections of arbitrary bands are possible and are used for the detailed analysis of specific frequency bands. A burst signal can be output with four different duty ratios. Features: - Sine wave generator (Sine): Sine wave signal (Preset frequencies: 200Hz, 1kHz, 2kHz, 8kHz) - Frequency Sweep generator (Sweep): Sine wave frequency sweep/warble signal (Preset frequencies: 20Hz - 20kHz, 200Hz - 2kHz, 2kHz - 8kHz, transition time: 30, 60, 120, 180sec), upward/downward sweep playback - Colored Noise generator with octave-band filter (Noise): White noise, Pink noise, Red noise (Brown noise), Blue noise, Purple noise and Gray noise. Octave-band noise generation by 1/1 or 1/3 octave-band filer (center frequency: 63Hz - 8kHz / 50Hz - 10kHz), burst playback with duty ratio of 10/25/50/75%. - Chirp signal generator (Chirp): Short-time sweep signal (transition time: 0.1 - 1.0sec, start delay time: 1 - 10sec, frequency variation curve: Linear/Exponential.) - Configurable frequency range: 20Hz - 21kHz - Frequency input by keyboard in units of 0.1Hz - Preset frequency customization function. - Playback time control: 30sec/60sec/2min/3min/15min/60min - Output gain control. - Output channel selection: LR/L/R - Output phase control: 0/180 degree - In-phase/Out-of-phase. Applications: - Sound testing for loudspeakers and headphones. - Testing and tuning for Audio amplifiers, equalizers and many other Audio equipment. - Acoustics testing. - Frequency response measurement. - Sound insulation level measurement. - Indoor sound field distribution measurement. - Reverberation time measurement. - Sound masking. - Relaxation and meditation. - Hearing test. Note: - Please be careful that the high-frequency signals of high volume in continuous may damage the loudspeakers, even if your ears do not perceive it as being too loud. - The chirp signal is a sweep signal of extremely short duration, so it does not guarantee a playback frequency in the specified range. - If no frequency is selected in the octave-band noise generation, the signal output will be silent. - When using this application with wireless communication such as Bluetooth or AirPlay, there may be cases that limitation of the playback frequency, lowering the output level and irregular noise, etc., may occur under the influence of wireless environment, communication equipment and communication state. Please note that this is not to guarantee that this application operates as configured specifications under the wireless communication. Please visit our iOS app support page for more information on this app.
SkyScan
This app uses AI to detect and automatically record unusual objects in the sky. It's designed for sky watchers, pilots, and researchers to capture sightings without missing a moment. The user-friendly interface makes it easy to document extraordinary phenomena.
- AI object detection
- Automatic video recording
- Pilot-friendly features
- Ground and in-flight use
- User-friendly interface
- Manual recording control
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Detect and record objects in the sky with SkyScan-UAP, the ultimate research tool for UFO and UAP enthusiasts. Using a custom trained AI model, our app detects objects in the sky and automatically starts recording, ensuring you never miss a moment of extraordinary phenomena. Whether you're on the ground or observing from a plane window, SkyScan-UAP is your go-to app for capturing videos of anything unusual in the sky! Join a global community of researchers and enthusiasts dedicated to gathering invaluable data on UFOs and UAPs. Our app is optimized to detect objects in the sky, so use indoors is not recommended as performance will be limited and false detections are likely. Key Features: - Perfect for Pilots: Allows pilots to capture anything interesting in the sky without diverting their focus. No sound is recorded to ensure cockpit privacy. - Advanced Object Detection: Utilize state-of-the-art machine learning/AI algorithms to detect objects in the sky in real-time. - Automatic Video Recording: When enabled, video recording starts immediately when an object is detected. Seamlessly capture high-quality videos the moment an object is detected, ensuring you document every sighting. - Versatile Use: Perfect for ground-based observations or in-flight use, providing flexibility for all your sky-watching needs. - User-Friendly Interface: Easy to use and ready to detect immediately when opened, making it accessible for both amateur enthusiasts and professional researchers. - Ability to manually start and stop video recording. - No audio is recorded to ensure user privacy.
Screenshots
Verdict
The clearest difference is update cadence: SkyScan at every 2 days against Audio Tone Generator Plus's every 6 months. SkyScan also leads on price ($0.99 vs $6.99) and iOS requirement (16.0 vs 26.2). On ads, in-app purchases 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
Audio Tone Generator Plus costs $6.99 and SkyScan $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Audio Tone Generator Plus ships an update every 6 months, SkyScan every 2 days. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | Audio Tone Generator Plus | SkyScan |
|---|---|---|
| Price | $6.99 | $0.99 — better |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone | iPhone |
| Requires iOS | 26.2 | 16.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | TOON,LLC | John Mock |
In-app purchases
Audio Tone Generator Plus
No in-app purchases
SkyScan
No in-app purchases
Questions
Is Audio Tone Generator Plus free?
Is SkyScan free?
Do Audio Tone Generator Plus or SkyScan have ads?
Which is updated more often, Audio Tone Generator Plus or SkyScan?
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