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Best Function Generator Pro Apps

250+ iOS apps curated and reviewed

4.7 avg rating
17 free apps
Updated October 2026

Looking for free function generator pro apps? 17 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Function Generator Pro Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Audio Function GeneratorAudio Function GeneratorFree4.7★ (2.2K)NoYesOct 2026
2Audio Function Generator PROAudio Function Generator PRO$9.994.8★ (270)NoNoOct 2026
3Tone Gen ProTone Gen ProFree4.5★ (45)NoYesJul 2026
4iFunctionGeneratoriFunctionGenerator$2.994.4★ (9)NoNoOct 2026
5GUID Generator by OpenSquareGUID Generator by OpenSquareFree—YesNoMay 2026
6rnd - Random Number Generatorrnd - Random Number GeneratorFree—NoNoMay 2026
7Random Number Generator -TF427Random Number Generator -TF427Free—YesNoMay 2026
8GeneratorGeneratorFree——NoSep 2026

Top Picks for Function Generator Pro

Audio Function Generator#1

Audio Function Generator by Thomas Gruber

Frequency and Signal Generator
Editor's Choice
🔧 Utilities
4.7😐(2.2K ratings)
FreeIn-App Purchases
Audio Function Generator screenshot 1
Audio Function Generator screenshot 2
Audio Function Generator screenshot 3
Audio Function Generator screenshot 4
Audio Function Generator screenshot 5
Audio Function Generator screenshot 6

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.

What We Love

  • 👍 Great app
  • 🎶 Helps with Tinnitus
  • 💯 Best app I've paid for
  • 🔍 Highly recommended
  • 🎨 Attention to detail
  • 🔧 Useful for testing and calibrating
  • 🚀 Excellent functionality
  • 🤖 Intuitive interface
  • 🎛️ Comprehensive features

Room to Improve

  • 🐛 Crashes
  • 💰 Deceptive/Money hungry
  • 🔒 Basic features paywalled
  • 🔒 Limited without paying
  • 🔒 Removed functionality to push paid version
  • 🔒 Frequencies locked behind paywall
  • 🔋 High battery consumption
Audio Function Generator PRO#2

Audio Function Generator PRO by Thomas Gruber

Frequency and Signal Generator
Strong Contender
🎵 Music
4.8😊(270 ratings)
$9.99
Audio Function Generator PRO screenshot 1
Audio Function Generator PRO screenshot 2
Audio Function Generator PRO screenshot 3
Audio Function Generator PRO screenshot 4
Audio Function Generator PRO screenshot 5
Audio Function Generator PRO screenshot 6

Generate various audio test tones, including sine, square, and sawtooth waves. Explore frequency and volume sweeps, custom presets, and different types of noise. Advanced settings allow for fine-tuning signal parameters and creating complex multi-tone sequences.

What We Love

  • ✨ Superb craftsmanship and work
  • 🚀 Excellent performance on older devices
  • 💡 History feature is a great addition
  • 👍 Versatile and powerful app
  • 🎶 Great for binaural beats and sound creation
  • 🔧 Customizable presets and modulation
  • 🎧 Useful for tinnitus relief
  • 🔊 Great for audio testing and tuning
  • 💡 Elegant and sophisticated interface
  • 💰 Best value for money
  • 🛠️ Excellent support
  • 🎛️ Detailed sound wave control
  • 🎯 Accurate and easy to use
  • 🔊 Good for speaker testing
  • 🎶 Useful for sleep entrainment
  • 🎹 Perfect for speaker building
  • 💡 Well-thought-out and implemented
  • 💯 Top frequency generator
  • ✅ All functions present
  • 🎚️ Bargain price, highly recommended
  • 🎶 Excellent for piano tuning
  • 👂 Useful for hearing checks
  • 🔬 Great for electronics lab
  • 💾 Parameter saving is great
  • 🚀 Sweep function is great
  • ⚙️ Practical tool, not overwhelmed with graphics
  • 🔊 Accurate and functional
  • 🎵 Easy to use, perfect for speakers
  • 🌟 Best in class
  • 🚀 Excellent application
  • 💡 Electronic tuning fork
  • ✅ Good multiple use app
  • 👍 Great as a function generator in the electronics lab
  • 💯 Excellent tone generator
  • ✨ Super top
  • 👍 Great app
  • 🚀 Great app
  • 🎶 Great app
  • 👍 Great app

Room to Improve

  • 📉 Linear sweep is useless
  • ❓ Missing PWM functionality
  • ❓ Missing Terzrauschen (third-octave noise)
  • 🐛 Volume button issues
  • 🐛 GUI is bad
  • 🐛 Buttons don't respond
  • 🐛 Settings don't keep
  • 🐛 Frequencies stick
  • 🐛 App stops too much
  • 📉 Frequency range not enough
  • 🐛 Update crashes on iPad Air2
  • 🐛 App opens AppStore repeatedly after purchase
Tone Gen Pro#3

Tone Gen Pro by Ibrahim Al-Sammarraie

Advanced tone generator
Worth Considering
🔧 Utilities
4.5(45 ratings)
FreeIn-App Purchases
Tone Gen Pro screenshot 1
Tone Gen Pro screenshot 2
Tone Gen Pro screenshot 3
Tone Gen Pro screenshot 4
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Tone Gen Pro screenshot 6

Create various audio signals, including single tones, sweeps, and merged sounds, with extensive parameter control. Ideal for students, musicians, educators, and audio professionals exploring sound.

More Function Generator Pro apps to explore

FAQ about Function Generator Pro

What are the best function generator pro apps for iPhone?
Audio Function Generator tops our function generator pro apps ranking as of October 2026, with a 4.7-star average from 2.2K App Store ratings, and it's free to download.
Yes — 17 of the top function generator pro apps we rank are free to download, including Audio Function Generator and Tone Gen Pro.
Audio Function Generator has no ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 250+ function generator pro apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.

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audio function generator pro