K vs Soren
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
K
This application provides hands-free audio feedback for tuning musical instruments. It audibly announces the string and its tuning status, making it accessible for visually impaired users and convenient for all. Advanced features and additional tunings are available through a one-time purchase.
- Hands-free audio tuning
- Spoken results for string and pitch
- VoiceOver integration
- Automatic string detection
- Capo support
- Visual meter for sighted users
- Multiple alternative tunings (Pro)
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K-Tuner is a guitar tuner that lets you tune with your capo on. Choose the capo fret on the tuner screen, and each stringβs target pitch moves up to match. Pluck a string, and the meter shows whether it is in tune, too low, or too high. No need to remove the capo between songs. Capo support and standard tuning are free. It also works without looking at the screen. Pluck a string, and K-Tuner automatically detects which string you played. Turn on "Speak aloud" in Settings to hear the result, or use VoiceOver. K-Tuner was designed from the ground up to support VoiceOver. HOW IT WORKS β’ Open the app and it starts listening right away. β’ Pluck one string. K-Tuner picks the string automatically. You can also tap a string button to lock it. β’ When the note settles, it speaks the result. It stays quiet while you are turning the peg, so it never talks over you. β’ If the note fades too soon, it gives you a rough reading such as "probably too high" instead of staying silent. β’ If another string is ringing and hiding the one you plucked, it tells you which string to mute. β’ Tap "Speak current reading" at any time to hear the string and how many cents it is off. MADE FOR VOICEOVER β’ Every control has a clear label and hint. β’ Start or stop with a two-finger double-tap (magic tap), so you never have to find a button while holding your guitar. β’ The meter and the constantly changing numbers are hidden from VoiceOver so the focus never jumps around. β’ Results are announced in the language of the app, and the announcements do not interrupt each other in the wrong order. NOT USING VOICEOVER? Turn on "Speak aloud" in Settings and K-Tuner speaks the results itself, at the rate you choose. Sighted players get a large circular meter with a needle that turns green when the string is in tune. FREE VERSION β’ Standard tuning (E A D G B E) β’ Capo β’ Automatic string picking β’ Spoken results and VoiceOver support β’ The visual meter K-TUNER PRO (one-time purchase) β’ 18 more tunings: half step down, whole step down, Drop D, Drop C, Drop B, Open D, Open E, Open G, Open A, Open C, DADGAD, Nashville, all fourths, all fifths, major thirds, guitalele, and ukulele (high G and low G) β’ Reference pitch from 430 to 445 Hz Pro is a single purchase, not a subscription. Buy it once and use it on all your iPhones and iPads with the same Apple ID. PRIVACY K-Tuner uses the microphone only to measure pitch. Nothing is recorded or saved, and no audio ever leaves your device. There are no accounts and no ads. If something goes wrong, you can choose to email the developer an activity log; it contains no audio. TIPS β’ Place your iPhone near the body of the guitar with the microphone facing it. Your lap or a music stand works fine. β’ Pluck with normal strength. A very hard pluck takes longer to settle. β’ Keep the microphone out of air-conditioner drafts. Questions or feedback? Use "Send Bug Report" or "Support" in Settings, or visit the support page.
Soren
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Finish your track. Hear the difference. Keep your sound on your device. Soren brings focused automated mastering to iPhone and iPad. Import a mix or video, choose the sound you want, compare the result, and export your finished file. TRY YOUR OWN SOUND FREE Master previews of up to 30 seconds with the same mastering quality and sound choices as the full version. Choose the section you want to hear. One permanent in-app purchase unlocks full-length listening and all audio and video exports. No subscription or per-track fees. FEWER DECISIONS. YOUR SOUND. Start with the defaults, or adjust genre, character and loudness, from Soft to Loud. Pick one of 27 Smart References or import your own reference track. Hear the actual original and mastered levels, or turn on Match loudness for a fair comparison at matched listening volume. MUSIC AND VIDEO Finish a song, a performance video or a spoken recording. Video imports offer video export with finished sound and the original picture. Import videos from Files or Photos. For spoken content, choose the Speech preset. Save finished videos directly to Photos or share them to Files and other apps. EXPORT WITH CONTROL Unlock WAV at 24 or 16 bits, MP3 at 320 kbps, and MOV video with finished audio. Use Soren's -0.8 dBTP peak ceiling or choose -1.0 dBTP. Video exports use a 24-bit PCM soundtrack, so files can be larger than the original compressed video. PRIVATE PROCESSING Audio processing happens on your device. No audio uploads, Soren account or cloud processing service. Apple handles in-app purchases. Supports files up to six minutes. Audio: mono/stereo WAV, AIFF, M4A and MP3 at 32-96 kHz. Video: supported MOV/MP4 files with a single mono/stereo soundtrack. Keep Soren open while it processes or exports. The mobile unlock is separate from desktop Soren. Requires iOS or iPadOS 17 or later.
Screenshots
Verdict
The clearest difference is in-app purchases: Soren at none against K's 4. On price, ads, device support and iOS requirement 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. K sells 4 one-off in-app purchases. Soren asks for nothing beyond the download.
| Parameter | K | Soren |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | β |
| Update frequency | Every 5 days | β |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Monetization | Free with in-app purchases | β |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details β not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Asoft.iOS | Rast Media GmbH |
In-app purchases
K
- A coffee$1.99
- A set of strings$5.99
- KTuner Pro$6.99
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- A big thank-you$19.99
Soren
No in-app purchases









