Comparison

Audio Function Generator vs File Conversion Tools

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

Head to head
About

Audio Function Generator

Generate various audio test tones, including sine, square, triangle, and sawtooth waves. Explore frequency and volume sweeps, noise generation, and custom preset creation. Advanced features like extended frequency ranges and multi-tone playback are available with an upgrade.

Highlights
  • Generate sine, square, triangle, and sawtooth tones
  • Frequency and volume sweep generation
  • Noise generation (white, pink, violet, etc.)
  • Custom preset creation and saving
  • Extended frequency range (PRO feature)
  • Multi-tone playback (PRO feature)
Features
Read full description

This is the highly recommended and praised Function Generator App - an amazingly great and powerful tone generator. Enriched with a vast amount of features yet it is extremely intuitive and designed for simplicity. Get to know this great App now! It is very well maintained and has received considerable upgrades over the past years. So, … what can you do with this App? • PLAY TEST TONES Sine, Rectangular, Triangular and Sawtooth. • PLAY FREQUENCY SWEEP TEST TONES in both directions (minimum to maximum frequency and maximum to minimum frequency). • PLAY VOLUME SWEEPS (from minimum to maximum volume). • Try the SWEEP REPEAT / WOBBLE function. • Try the MUSIC TONES PLAYBACK. • Experiment with the huge FINE TUNE SELECTON, PRESETS SELECTION! • Or create your own CUSTOM PRESETS! • And SAVE an endless amount of CONFIGURATIONS (Frequency, Sweep, Noise) for later quick access and direct playback function. • Even play back different kinds of NOISE – White, Pink, Violet, Grey, Brown, Blue is also supported. The Function Generator is AMAZINGLY INTUITIVE and SIMPLE to use! AND THESE ARE THE ADVANCED SETTINGS/FEATURES (upgrade to PRO required): => Extending The Frequency Range (1Hz - 21kHz) => Extending The Sweep Times (0.1s - 600s) => Changing Min/Max Slider Frequency Ranges => Changing Max Sweep Time Slider Range => Changing Signal Amplitude => Enabling Of The Sweep Repeat / Wobble Function => Frequency Slider Setting to Linear or Logarithmic => Left/Right Channel Individual Selection => Permanently Saving Custom Presets => Saving Of Endless Number Of Audio Configurations => Phase Out Setting (custom phase shift of the generated signal) => BPM (Beats per Minute) Feature => Dual Function Generator => MultiTone Generator (playback of up to eight individual tones) => Background Theme Selection (Light/Dark) Check out the tutorial page: www.ee-toolkit.com/audio-function-generator

About

File Conversion Tools

This utility app allows users to convert a wide range of file types, including documents, music, eBooks, and images. It supports numerous target formats and offers advanced options like PDF password protection and metadata removal from images.

Highlights
  • Convert music to multiple audio formats
  • Convert documents to DOC, PDF, XLS, PPT, and more
  • Convert eBooks to EPUB, MOBI, PDF, and other formats
  • Lock and unlock PDFs with password protection
  • Convert documents to images
  • Remove image metadata including GPS data
Features
Read full description

The File Conversion Tool converts documents, songs, eBooks, and other files using the www.conversion-tool.com tools backend service. Web: https://www.conversion-tool.com ## Target formats ## - Convert music to: AAC, AIFF, FLAC, M4A, MP2, MP3, OGG, OPUS, RA, WAV, WMA. - Change the frequency of music, for instance from 440Hz to 432Hz. - Change the pitch and speed (tempo) of music independently. - Convert MIDI files to high quality MP3, WAV, and M4A. - Convert websites to PDF. - Convert documents to DOC, DOCX (Microsoft Word), ODT (Open Document Text), HTML, PDF, PPT, PPTX (PowerPoint), ODP (Open Document Presentation), RTF, TXT, XLS, XLSX (Excel), ODS (Open Document Spreesheet). - Convert eBooks to ARW, EPUB, FB2 (Hanlin), HTML, LIT, LRF (Sony), MOBI, OEB, PDB (Palm), PDF, PML, RB, RTF, SNB, TCR, TXT, and TXT compressed. - Lock PDFs (add password protection, add print/edit/annotation/copy protections). - Unlock PDFs. - Convert documents (doc, pdf, xls, etc.) to images (jpg, png, etc.). - Convert HEIC/HEIF images. - Remove EXIF/XMP and other metadata tags from images (including GPS location data).

Screenshots

Audio Function Generator4 screens
File Conversion Tools3 screens

Verdict

The call

The clearest difference is review sentiment: Audio Function Generator at 77% against File Conversion Tools's 17%. Audio Function Generator also leads on rating (4.7 vs 2.0) and ratings volume (2.2K vs 7). File Conversion Tools's advantage is in-app purchases (none vs 1) and iOS requirement (10.0 vs 15.5). On price, update cadence, ads 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. Audio Function Generator sells 1 one-off in-app purchase. File Conversion Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Audio Function Generator holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 77% of Audio Function Generator's written reviews are positive against 17% of File Conversion Tools's.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, File Conversion Tools every 3 weeks. The most recent releases landed on September 29, 2026 and September 3, 2026 respectively.

Scorecard6 real differences · 4 level
Audio Function Generator versus File Conversion Tools: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorFile Conversion Tools
PriceFreeFree
Rating4.7 (2.2K ratings) — better2.0 (7 ratings)
Positive reviews77.1% of reviews — better16.7% of reviews
Number of ratings2.2K — better7
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.510.0 — better
Further details — not scored
Size14 MB50 MB
Age rating4+4+
DeveloperThomas GruberHarald Meyer

Customer experience

Audio Function Generator

All ratings2,191 ratings
Positive91.8%
Neutral3.1%
Negative5.1%
Written reviews271 reviews
Positive77.1%
Neutral6.3%
Negative16.6%

File Conversion Tools

All ratings7 ratings
Positive28.6%
Neutral0.0%
Negative71.4%
Written reviews6 reviews
Positive16.7%
Neutral0.0%
Negative83.3%

Bugs and requests

Audio Function Generator

Reported bugs

4 issues
  • Crashes on launch
  • Volume slider issues
  • Airplay not working
  • Sound distortion when display is active

Requested features

6 requests
  • Add download/save feature for custom sounds
  • Improve sweep function (continuous mode, better frequency control)
  • Add more multi-frequency rows
  • Implement 432Hz base frequency option
  • Add phase control for noise generators
Show 1 more
  • Improve accessibility (VoiceOver support)

File Conversion Tools

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99
None

File Conversion Tools

No in-app purchases

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is File Conversion Tools free?
File Conversion Tools is free to download, with no in-app purchases.
Which has better reviews, Audio Function Generator or File Conversion Tools?
Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while File Conversion Tools averages 2.0 from 7 ratings.
Do Audio Function Generator or File Conversion Tools have ads?
Neither Audio Function Generator nor File Conversion Tools shows ads.
Which is updated more often, Audio Function Generator or File Conversion Tools?
Audio Function Generator ships an update every 6 weeks, and File Conversion Tools every 3 weeks. Most recently, Audio Function Generator was updated on September 29, 2026 and File Conversion Tools on September 3, 2026.

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