Audio SA vs PurrTalk | LINE Chat Analyzer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Audio SA
This app analyzes audio waveforms to create visual voiceprints as TFFT images. It offers extensive customization for FFT analysis, including adjustable ranges, sizes, scales, and window functions. A simple waveform generator is also included for learning purposes.
- TFFT voiceprint image generation
- High-resolution image export
- Customizable FFT analysis settings
- Adjustable audio waveform analysis range
- Simple waveform generator (sine, square, noise)
- Multiple FFT sizes and window functions
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"Audio SA" is a spectrum analyzer that can capture voiceprints as TFFT images. The created TFFT image can be exported as a high resolution image. (Image size example iPhoneSE3: 4096×4096, iPhoneX: 6144×6144) If you just want to try creating a voiceprint, you don't need to worry about the settings. Just record your voice and run the TFFT to see the voiceprint. "Audio SA" can also be used for FFT-related learning. You can also check changes in important characteristics such as FFT frequency resolution and dynamic range while switching the FFT size and window function. As an additional function, we have implemented a simple waveform generator, so please try it when learning. The simple waveform generator can generate sine waves, square waves, Gaussian white noise, and their combinations. When using TFFT images for machine learning, etc., it will be necessary to give sufficient consideration to the settings. "Audio SA" allows you to set the audio waveform analysis range, FFT size, power spectrum scale, window function, and drawing color. The analysis range of the audio waveform is set by scaling and moving the audio waveform. The displayed range becomes the analysis range. Tap the play button to play only the analysis range, which is convenient for checking. FFT size can be selected from 256,512,1024,2048,4096,8192,16384,32768. (However, you can select from 256, 512, 1024, 2048, and 4096 during recording and playback.) The power spectrum scale can be selected from Linear scale, Log scale, and Mel scale. For Mel scale, you can set the break frequency. The mel scale is close to a linear scale up to the break frequency and close to a log scale after the break frequency. 700Hz, which is the most commonly used frequency, is set as the default value. The window function can be selected from Blackman, Hamming, Hann, Rectangular. It is recommended to choose Blackman when wide dynamic range is required and Hamming when high frequency resolution is required. Roughly speaking, Hann is a trait between Blackman and Hamming. For Rectangular, no special window function is multiplied during FFT transform. The audio data cut out from the audio waveform for the FFT size is used as it is. In addition, the lower limit of the dynamic range when drawing TFFT images can also be set. It's easy to set up, just swipe up and down on the FFT image. The part displayed as the FFT image is drawn as it is in the TFFT image. "Audio SA" consumes tickets to record audio. Tickets can be earned by watching ads. However, if you purchase "Remove Ads" as an in-app purchase, you will be able to record without a ticket. [details] https://app.brain-workout.org/spectrumanalyzer-e/
PurrTalk | LINE Chat Analyzer
Analyze your LINE chat history to uncover relationship dynamics. This app provides compatibility scores, relationship archetypes, and insights into communication patterns like reply pace and affection words. All analysis is performed locally on your device for maximum privacy.
- Compatibility score
- Relationship archetypes
- Communication lenses
- Affection word analysis
- Reply pace breakdown
- Time-series communication graph
- AI-powered summary
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Decode the chats you've already had. PurrTalk reads your LINE chat history and gives you something better than vibes — a real score, a relationship type, and the small patterns about how you two actually talk that you've never noticed. Drop in the .txt export, and 30 seconds later you see: • A 77/100 compatibility score (yours might differ) • One of 20 relationship archetypes — Slow Burn, Golden Hour, Storm & Sun, and more • Six lenses: Volume, Warmth, Rhythm, Care, Progress, Communication • Affection Word Garden — who says "thanks", "miss you", "love" most often • Reply pace breakdown — the 1-minute mirrors, the silent 12-hour gaps, the night-chat ratio • Time-series graph — how the rhythm shifts over months • AI summary that reads between the lines EVERYTHING STAYS ON YOUR PHONE Your chat history never leaves the device. We don't store, upload, or peek. The AI runs locally, protected by iOS hardware encryption. "Delete All" is one tap, no undo, gone clean. PERFECT FOR • Couples wondering if you're a Slow Burn or a Honey Hour • Friends curious whether your text rhythm matches the bond • Anyone re-reading the same LINE chat for the 100th time wanting a fresh perspective • People who love kawaii pastel aesthetics with depth underneath WHY PURRTALK • butterPeach palette — soft, paper-textured, polaroid-styled • Lav & Minto, our cat duo mascots, walk you through every screen • 100% local processing — no cloud, no account, no ads • Free for the core read; we'll never paywall the basics GET STARTED 1. Export your LINE chat as .txt (we walk you through 5 steps) 2. Drop the file into PurrTalk 3. Tap once. Get the read. Made with love for people who want to read between the lines, gently. Support: support@giblee.app Privacy Policy: https://purrtalk.giblee.app/privacy Terms of Service: https://purrtalk.giblee.app/terms
Screenshots
Verdict
The clearest difference is in-app purchases: PurrTalk | LINE Chat Analyzer at none against Audio SA's 1. PurrTalk | LINE Chat Analyzer also leads on ads (none vs shown). Audio SA's advantage is iOS requirement (15.6 vs 17.0). On price 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. Audio SA sells 1 one-off in-app purchase. PurrTalk | LINE Chat Analyzer asks for nothing beyond the download.
| Parameter | Audio SA | PurrTalk | LINE Chat Analyzer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 months | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 28 MB |
| Age rating | 4+ | 12+ |
| Developer | Yasuyoshi Ota | 锦菊 曾 |
Customer experience
Audio SA
PurrTalk | LINE Chat Analyzer
In-app purchases
Audio SA
- Remove ads.$3.99
PurrTalk | LINE Chat Analyzer
No in-app purchases
Questions
Is Audio SA free?
Is PurrTalk | LINE Chat Analyzer free?
Do Audio SA or PurrTalk | LINE Chat Analyzer have ads?
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