PSOFT Audio Player vs Jazz Practice Journal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PSOFT Audio Player
This music player allows independent adjustment of key, playback speed, and sound extraction with exceptional audio quality. It's ideal for musicians, language learners, and anyone needing to analyze or manipulate audio content.
- Change playback speed
- Adjust musical key
- Modify voice characteristics
- Remove or extract specific sounds
- Analyze music and display chords
- Export modified audio (add-on)
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“Freely manipulate sound with incredibly natural results.” Make the comparison with your own ears. This music player makes it easy to independently change your music's key and playing speed and remove or extract specified sounds, while preserving an overwhelming audio quality that cannot be matched. Recommended for: ・ Musical instrument practice. ・ Making karaoke tracks. ・ Musical transcription. ・ Creating audio tracks for dance practice. ・ Learning foreign languages by listening to podcasts. ・ Efficiently gathering information from podcasts. ・ Audio-typing comfortably. With usual audio equipment, large changes to key and playing speed typically result in a heavy degradation of the audio quality. However, by using our company's “PhaseGear” technology, this app succeeds in reducing audio degradation to its utmost minimum. The result is surprisingly natural-sounding audio. ============== [ Main Features ] ============== ▼ Change playing speed [Time stretch] Change the playing speed without affecting the key (0.00x – 4.00x). ▼ Change key [Pitch shift] Change the key without affecting the playing speed (±24.00 semitones). ▼ Change voice [Formant] Apply changes to voices (±24.00). Includes the [Correction] function which restrains voice alterations caused by changing the key. ▼ Remove / extract sounds [Audio masking] Visualize the audio and remove / pick out sound from a specified band. Obtain exceptional audio quality thanks to a new technology preventing mixing in rhythm sound. * Depending on the musical structure, it might not be possible to obtain the desired results. ▼ Analyze audio and display chords [Musical scale analysis] Analyzes music as it plays and displays the musical scale on a keyboard. Also allows on-screen display of inferred chords. ▼ Output the modified audio [Export (*Add-on)] Output the audio data file with modified key, sound masking, etc. The exported file can also be used with a PC or other device. * This function must be purchased as an add-on. ====================================== ■ Specifications - Play menu - Play / Pause - Skip 15s / Back 15s (*Only available on 4 inch displays) - Fast forward / Rewind - Next song / Previous song - Play position adjustment slider - Play mode - Play all songs - Repeat all songs - Play 1 song - Repeat 1 song - Shuffled play - Shuffled repeat - Share song information - Send the current song info to other apps, share functionality. - Select songs by - Playlist - Song - Artist - Album - Composer - Genre - Compilation - Podcast - Audiobook - Document - Supports background play * Note Contents on iCloud and protected contents not supported. ■ About PhaseGear PhaseGear is our company's audio signal processing engine based on patented technology. It implements high quality time stretch and pitch shift processing as well as superior sound masking. Please refer to the link below for more details about this technology. (*In Japanese) http://www.psoft.co.jp/jp/corporate/technology/phasegear.html * Patent registered in Japan, USA and South Korea.
Jazz Practice Journal
Log music practice sessions quickly, identify areas for improvement, and build motivation with streaks. Features include an AI coach, automatic routine generation, and multi-instrument support.
- Log practice sessions in 30 seconds
- AI practice coach identifies blind spots
- Automatic daily routine generation
- Multi-instrument support with presets
- Integrated metronome, tuner, and drone (Pro)
- Streak tracking for motivation
- Weekly and monthly practice reviews
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Jazz Practice Journal helps you work through your daily practice routine, log every session, and stay on track — in seconds. Start free. ◆ YOUR ROUTINE, TOP TO BOTTOM Line up the exercises you do every day, in the order you do them. They appear on Home with the next one highlighted, so you can start right away. Begin with a suggested routine for your instrument, or build your own. ◆ SAVE AND KEEP GOING Save one item and go straight to the next — no trip back to Home. Key and tempo carry over from last time. ◆ LOG A SESSION IN 30 SECONDS Practicing something outside your routine? Tap a preset and you're practicing. ◆ MULTI-INSTRUMENT Trumpet, Trombone, Tenor Sax, Alto Sax, Baritone Sax, Piano, Bass, Drums, Guitar, and Vocal — each with its own presets. Key transposition (C / Bb / Eb) for horn players. ◆ METRONOME, TUNER & DRONE (Pro) All your practice tools, one tap from the practice screen. ◆ WEEKLY & MONTHLY REVIEW See your practice time, top exercises, and how each session felt — in clear charts. ◆ SPACED REVIEW (Pro) Get reminded to revisit each piece at the right time, based on the forgetting curve. Make every session stick. ◆ PRO ($4.99/month) • Spaced review (forgetting curve) • Metronome, tuner, drone • Full history & analytics Terms of Use: https://music-practice-coach.vercel.app/terms Privacy Policy: https://music-practice-coach.vercel.app/privacy
Screenshots
Verdict
The clearest difference is review sentiment: PSOFT Audio Player at 69% against Jazz Practice Journal's 0%. PSOFT Audio Player also leads on rating (3.5 vs 1.0) and ratings volume (4 vs 1). Jazz Practice Journal's advantage is price (Free vs $6.99) and update cadence (weekly vs every 2 months). 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
Jazz Practice Journal is free to download; PSOFT Audio Player costs $6.99 up front. PSOFT Audio Player sells 1 one-off in-app purchase and Jazz Practice Journal sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
PSOFT Audio Player holds the better App Store score, 3.5 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 69% of PSOFT Audio Player's written reviews are positive against 0% of Jazz Practice Journal's.
PSOFT Audio Player ships an update every 2 months, Jazz Practice Journal weekly. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.
| Parameter | PSOFT Audio Player | Jazz Practice Journal |
|---|---|---|
| Price | $6.99 | Free — better |
| Rating | 3.5 (4 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 69.2% of reviews — better | 0.0% of reviews |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 5 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | PSOFT | Toshihiro Suzuki |
Customer experience
PSOFT Audio Player
Jazz Practice Journal
In-app purchases
PSOFT Audio Player
- Export Add-on$24.99
Jazz Practice Journal
- Pro - monthly14 Days trial$3.991 Month
Questions
Is PSOFT Audio Player free?
Is Jazz Practice Journal free?
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