Comparison

MP3 Converter vs Document Scanner & PDF

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

Head to head
About

MP3 Converter

This app allows users to convert videos to audio files and edit audio with various tools. Features include cropping, speed adjustment, fade effects, volume control, and format conversion. It also offers audio extraction from video, vocal separation, and ringtone creation.

Highlights
  • Video to MP3 conversion
  • Audio cropping and splicing
  • Variable playback speed
  • Fade in/out effects
  • Volume adjustment
  • Audio extraction from video
  • Vocal separation
Features
Read full description

[MP3 Converter-Video to Audio MP3 and other formats] is a simple-to-operate, powerful audio and video format conversion and audio editing tool with various functions for operating audio. Cropping: Supports free cropping of audio and precise control of cropping time Variable speed: 0.1 to 4 times speed, you can choose Fade out and in: supports audio start and end gradients from 0 to 5 seconds Volume adjustment: 0-100 volume adjustment, no longer worry about the volume being too loud Audio splicing, reverberation Supports freely changing the order of splicing audio, and reverberating different audio at the same time format conversion Supports the conversion of audio formats such as mp3, m4a, m4r, aac, wav, flac, caf, etc., and also supports the conversion of video formats such as mp4, mkv, 3gp, m4v, mov, avi, f4v, etc. Special feature Audio extraction: Extract audio from video with one click Vocal separation: separate vocals and background sounds Set as ringtone: Convert audio to ringtone with one click and easily set ringtone for incoming calls Audio Reverse: Play audio backwards to experience a different kind of fun Volume gain: Increase the audio volume appropriately to make the sound brighter Auto-Renewal 1. Payment: After the user confirms the purchase and makes the payment, it will be credited to their iTunes account. 2. Cancel subscription: If you need to cancel the subscription, please manually turn off the auto-renewal function in the iTunes/Apple ID settings management 24 hours before the current subscription period expires. After cancellation, no further charges will be made. 3. Renewal: The Apple iTunes account will be charged within 24 hours before the expiration. After the deduction is successful, the subscription period will be extended for one subscription period. Privacy Policy: https://docs.google.com/document/d/1i_5KSJ3RchkF-mT3IZo5kXz5EAbw5cktAIX90ejPn0c/edit?usp=sharing Terms of Use: https://docs.google.com/document/d/1xCJFPsbwypCZrKEI9Y8DRCy1ki7X-ahugxTWo_dZ9Ac/edit?usp=sharing

About

Document Scanner & PDF

Features
Read full description

Scan documents, turn photos into PDFs and share only what you need to. Dokus keeps your copies in a document wallet, ready to use even without an internet connection. FROM PAPER TO PDF Scan documents with your iPhone camera. The scanner adjusts the edges and perspective, and saves multiple pages in one document. You can also import photos, images and PDFs from Files or send them to Dokus from another app's share menu. PHOTOS TO PDF, PDF TO JPG Convert JPG, PNG or HEIC images to PDF, or turn a PDF page into a JPG. Keep the front and back of a card together and add pages when you need them. To share several documents at once, combine your copies into one PDF or a ZIP file. SMALLER FILES, EASIER TO SEND Attach a document to an application or email a copy without carrying the full file size with it. Compress PDFs and photos before sharing, then check the result and the copy's size before you send it. SHARE ONLY WHAT THEY NEED A hotel, car rental company or university may each need a different copy. Add a watermark with your own text and the date to say who the copy is for and what it may be used for. Hide document numbers, signatures or other details the recipient does not need. You can also send a password-free copy of a PDF after unlocking it with its password. Prepare your copy and see how it will look before it leaves. Your original stays intact. Scanning, conversion, compression and every sharing tool are free. YOUR DOCUMENTS, EASY TO FIND Passport, state ID card, driver's license, student ID, insurance card and travel reservations: keep copies of the documents you reach for. Organize them in folders by trip, person or subject, choose colors and find what you need quickly. Turn on sync through your own iCloud to keep your documents available on your iPad and Mac too. AT HAND, EVEN OFFLINE At a check-in desk, at the airport or abroad, open the documents saved on your iPhone even in Airplane Mode. Use shortcuts on the Lock Screen and in Control Center to get to them faster. PRIVATE FROM THE FIRST DOCUMENT No sign-up, no ads and no trackers. Protect access with Face ID or Touch ID. Your documents are encrypted on your device and in your own iCloud when sync is enabled. We never receive or have access to the contents of your documents. DOKUS PLUS For more documents and a heads-up before they expire, Dokus Plus adds unlimited documents, expiry reminders and copies without the Dokus banner. Choose a monthly or yearly subscription, or a lifetime purchase with a single payment. Scan your first document. Have a copy ready when someone asks. License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Learn more: https://dokus.app/

Screenshots

MP3 Converter4 screens
Document Scanner & PDF4 screens

Verdict

The call

The clearest difference is update cadence: Document Scanner & PDF at every 2 days against MP3 Converter's weekly. MP3 Converter's advantage is iOS requirement (13.0 vs 26.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MP3 Converter sells 3 in-app purchases, starting at $4.99 per 7 days and Document Scanner & PDF sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

MP3 Converter ships an update weekly, Document Scanner & PDF every 2 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
MP3 Converter versus Document Scanner & PDF: the parameters behind the verdict, then further details
ParameterMP3 ConverterDocument Scanner & PDF
PriceFreeFree
Rating4.9 (8 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings8 — better—
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS13.0 — better26.0
Further details — not scored
Size86 MB23 MB
Age rating9+4+
DeveloperAudioConversionJoao Cunha

In-app purchases

3 purchases

MP3 Converter

Subscriptions3
  • Weekly membership3 Days trial$4.997 Days
  • Monthly membership3 Days trial$6.991 Month
  • Annual membership3 Days trial$14.991 Year
4 purchases

Document Scanner & PDF

Subscriptions2
  • Dokus+ Monthly1 Month trial$1.991 Month
  • Dokus+ Yearly7 Days trial$9.991 Year
One-time2
  • Dokus Plus Lifetime Offer$9.99
  • Dokus+$19.99

Questions

Is MP3 Converter free?
MP3 Converter is free to download, with in-app purchases available.
Is Document Scanner & PDF free?
Document Scanner & PDF is free to download, with in-app purchases available.
Do MP3 Converter or Document Scanner & PDF have ads?
Neither MP3 Converter nor Document Scanner & PDF shows ads.
Which is updated more often, MP3 Converter or Document Scanner & PDF?
MP3 Converter ships an update weekly, and Document Scanner & PDF every 2 days. Most recently, MP3 Converter was updated on October 30, 2026 and Document Scanner & PDF on October 28, 2026.

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