Comparison

Export Audio vs StoneFrog Knots

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Export Audio

Easily extract audio from QuickTime (.mov) and MP4 videos. Select a video, specify the extraction time range, choose an output format, and save your audio clip. You can also add custom metadata and artwork to your audio files.

Highlights
  • Extract audio from MP4 and MOV videos
  • Select start and end times for extraction
  • Choose from multiple output audio formats
  • Add custom artwork and metadata
  • Save and share extracted audio files
  • Access files via the Files app
Read full description

Extract audio from QuickTime (.mov) and MP4 videos with this easy-to-use audio extractor app. Select a QuickTime or MP4 video from the Photos app or Files app. Set the start and end time for extraction, enter a custom audio file name, and choose your preferred output audio format. Extract and save the audio clip in the format you selected. You can also add custom artwork and artist metadata to your extracted audio files when using formats like AIFC, AIFF, FLAC, M4A, MP3, MP4, or WAV. Easily open or share your extracted audio files with other apps. All extracted audio files are saved and accessible from the Files app: On My iPhone/iPad → MovieToAudio → Audio 【Supported Audio Formats】 - AIFC - AIFF - CAF - FLAC - M4A (recommended) - MP3 - MP4 - WAV 【Additional Notes & Troubleshooting】 Need more features or have suggestions? Just leave a review; I will do my best to improve. **Troubleshooting Tips:** If your extracted files don't appear in the Files app, try restarting your device. If you encounter extraction errors: • Restart your device • Move the video from the Photos app to the Files app, then open it from there • If the issue persists, send the video file or a downloadable link to the support email so I can investigate and improve the app If you enjoy using this app, please leave a review or rating—thank you for your support! 【About IN APP PURCHASE】 Removing ADs is available via an auto-renewable yearly subscription. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Manage your subscriptions in Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. Privacy Policy: https://nobu-y-dev.web.app/export-audio/privacy-policy.html Terms and Conditions: https://nobu-y-dev.web.app/export-audio/terms-and-conditions.html

About

StoneFrog Knots

Explore the intricate connections between musicians with interactive graphs. Discover band members, collaborations, and musical history using extensive open data sources. Save favorite artists and sync your progress across devices.

Highlights
  • Interactive relationship graphs
  • Artist detail pages
  • Band member timelines
  • Discography with artwork
  • Save and restore graph views
  • Syncs across devices
Features
Read full description

StoneFrog Knots reveals the hidden connections between musicians. Search over 2.9 million artists and instantly see an interactive graph of band members, collaborations, and musical lineage — built from open data sources including MusicBrainz, Wikidata, Wikipedia, and Discogs, enhanced by our own supplemental database. INTERACTIVE RELATIONSHIP GRAPHS Explore force-directed graphs that map artist connections in real time. Select any node to see its details, or double-click (double-tap on iPad) to expand the web and discover who played with whom across bands, side projects, and eras. POWERFUL TOOLS • Filter the graph by year range to watch relationships evolve over time • Switch between 2D organic and 3D solar system layouts • Save and restore graph views to pick up where you left off • Full keyboard navigation support RICH ARTIST DETAILS • Band member timelines showing who played when • Discography with album details and artwork • Member origin map powered by Wikidata coordinates • Artist biographies sourced from Wikipedia • Direct links to Wikipedia and Discogs pages YOUR LIBRARY • Save favorite artists and access them instantly • Browse your Apple Music library to find artists in the graph • Recent searches for quick access • Syncs across devices with your Knots account Built native for macOS and iPad with Metal-powered rendering. Sign in with Apple for a seamless experience.

Screenshots

Export Audio4 screens
StoneFrog Knots4 screens

Verdict

The call

The clearest difference is ads: StoneFrog Knots at none against Export Audio's shown. StoneFrog Knots also leads on update cadence (every 3 days vs every 2 months) and rating (5.0 vs 4.8). Export Audio's advantage is ratings volume (315 vs 1) and iOS requirement (15.6 vs 26.0). On price, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Export Audio sells 5 in-app purchases, starting at $4.99 per year and StoneFrog Knots sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

StoneFrog Knots holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Export Audio has 315 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Export Audio ships an update every 2 months, StoneFrog Knots every 3 days. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 5 level
Export Audio versus StoneFrog Knots: the parameters behind the verdict, then further details
ParameterExport AudioStoneFrog Knots
PriceFreeFree
Rating4.8 (315 ratings)5.0 (1 ratings) — better
Positive reviews87.1% of reviews—
Number of ratings315 — better1
Update frequencyEvery 2 monthsEvery 3 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better26.0
Further details — not scored
Size31 MB15 MB
Age rating4+4+
DeveloperNobutaka YuasaJason Stone

Customer experience

Export Audio

All ratings315 ratings
Positive96.5%
Neutral1.9%
Negative1.6%
Written reviews101 reviews
Positive87.1%
Neutral6.9%
Negative5.9%

StoneFrog Knots

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Export Audio

Reported bugs

8 issues
  • Extract error messages preventing conversion
  • Fullscreen ad placement blocking intended buttons on older iPhones
  • Extracted files not appearing in phone's music app
  • Files not showing in gallery after extraction
  • Recently added videos not displaying in gallery
Show 3 more
  • App crashes rendering it temporarily unusable
  • Files saved with 'img' prefix instead of proper conversion
  • App only saving in video format instead of audio

Requested features

12 requests
  • One-time payment option to remove all ads
  • Playlist creation and management
  • Search functionality for audio library
  • Batch file selection for uploading
  • Equalizer feature
Show 7 more
  • Support for long videos (3+ hours)
  • Copy link button
  • Free movement/repositioning of audio files
  • Direct import to music library
  • Access to organized photo albums in gallery
  • Repeat and loop functions
  • Donation options with multiple amounts

StoneFrog Knots

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Export Audio

Subscriptions1
  • Remove ADs$4.991 Year
One-time4
  • Small Coffee$1.99
  • Medium Coffee$2.99
  • Large Coffee$4.99
Show 1 more
  • Barista Special$9.99
2 purchases

StoneFrog Knots

Subscriptions2
  • Knots Premium7 Days trial$1.991 Month
  • Knots Premium7 Days trial$19.991 Year

Questions

Is Export Audio free?
Export Audio is free to download, with in-app purchases available.
Is StoneFrog Knots free?
StoneFrog Knots is free to download, with in-app purchases available.
Which has better reviews, Export Audio or StoneFrog Knots?
StoneFrog Knots is rated higher. Export Audio averages 4.8 out of 5 from 315 ratings, while StoneFrog Knots averages 5.0 from 1 ratings.
Do Export Audio or StoneFrog Knots have ads?
Export Audio shows ads; StoneFrog Knots does not.
Which is updated more often, Export Audio or StoneFrog Knots?
Export Audio ships an update every 2 months, and StoneFrog Knots every 3 days. Most recently, Export Audio was updated on October 14, 2026 and StoneFrog Knots on October 11, 2026.

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