Best Function Generator Apps

220+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated July 2026

Finding the right function generator apps can be overwhelming with so many options. We've analyzed 220+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Function Generator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Audio Function GeneratorAudio Function GeneratorFree4.7β˜… (2.1K)NoYesJul 2026
2Tone Generator: Audio Sound HzTone Generator: Audio Sound HzFree4.7β˜… (2.6K)YesNoJul 2026
3Frequency: Sound GeneratorFrequency: Sound GeneratorFree4.7β˜… (340)YesNoJul 2026
4Tone Generator EXTone Generator EXFree4.8β˜… (439)YesNoJul 2026
5Frequency Sound Wave GeneratorFrequency Sound Wave GeneratorFree4.8β˜… (66)YesYesJul 2026
6Signals GeneratorSignals GeneratorFree4.7β˜… (28)NoYesJun 2026
7Audio Function Generator PROAudio Function Generator PRO$12.994.8β˜… (265)NoNoJul 2026
8Tone Gen ProTone Gen ProFree4.5β˜… (45)NoYesJul 2026

Top Picks for Function Generator

Audio Function Generator#1

Audio Function Generator by Thomas Gruber

Frequency and Signal Generator
Editor's Choice
πŸ”§ Utilities
4.7😐(2.1K 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

  • πŸ‘ Great app
  • 🎢 Helps with Tinnitus
  • πŸ’― Best app I've paid for
  • πŸ” Highly recommended

Room to Improve

  • πŸ› Crashes
  • πŸ’° Deceptive/Money hungry
  • πŸ”’ Basic features paywalled
Tone Generator: Audio Sound Hz#2

Tone Generator: Audio Sound Hz by TMSOFT

Generate Audio Frequency Waves
Strong Contender
🎡 Music
4.7😊(2.6K ratings)
FreeAds
Tone Generator: Audio Sound Hz screenshot 1
Tone Generator: Audio Sound Hz screenshot 2
Tone Generator: Audio Sound Hz screenshot 3
Tone Generator: Audio Sound Hz screenshot 4
Tone Generator: Audio Sound Hz screenshot 5

Create pure sine wave audio tones across a wide frequency range. This tool is ideal for tuning instruments, conducting hearing tests, performing science experiments, and testing audio equipment. Easily adjust frequencies and volume, with support for AirPlay devices.

What We Love

  • πŸ‘ Simple and straightforward
  • πŸš€ Works as expected
  • πŸ’‘ Useful for testing and tuning
  • πŸ’‘ Helps identify hearing range

Room to Improve

  • πŸ› Ads can interfere with usage
  • πŸ”§ Difficulty fine-tuning frequency
  • πŸ”§ No amplitude/volume display
Frequency: Sound Generator#3

Frequency: Sound Generator by Lucija Jaksic

Worth Considering
πŸ”§ Utilities
4.7😊(340 ratings)
FreeAds
Frequency: Sound Generator screenshot 1
Frequency: Sound Generator screenshot 2
Frequency: Sound Generator screenshot 3

Generate various sound waves, including sine, square, sawtooth, and triangle, with adjustable frequencies from 1Hz to 22000Hz. Visually observe animated sound waves and control volume. Useful for testing hearing, speakers, instruments, and even cleaning water from speakers.

What We Love

  • πŸ‘ Simple and easy to use interface
  • 🎡 Accurate frequency generation
  • πŸ’° Free application
  • 🧘 Helpful for meditation and stress relief

Room to Improve

  • πŸ“’ Intrusive and inappropriate advertisements
  • πŸ”Š Potential audio damage to speakers/hearing
  • πŸ”’ Privacy concerns and data collection issues

More Function Generator apps to explore

4
Tone Generator EX
Tone Generator EX
Tone Generator EX
by An-Che Lee
Free

Generate a wide range of audio tones with adjustable frequencies and waveforms. Control playback in the background, from your notification drawer, or lock screen. The app automatically pauses for calls and alarms, and allows you to save custom presets.

Frequency range 15Hz to 22KHzSine, Square, Sawtooth, Triangle waveformsAuto-off timer
πŸ”§ Utilities
(439)
ad-supported
5
Frequency Sound Wave Generator
Frequency Sound Wave Generator
Frequency Sound Wave Generator
Try frequency generator tools
Free

Generate and analyze a wide range of sounds and frequencies. Explore tone generation, sound tests, musical tuning, and create custom sound effects. Visualize sound waves and experiment with different waveforms.

Single and multiple frequency generationMusical notes presetsBinaural beats
πŸ”§ Utilities
(66)
free with in-app purchases
6
Signals Generator
Signals Generator
Signals Generator
Dual channel signal generator
Free

Transform your mobile device into a dual-channel signal generator for sound and audio electric signals. Offers a wide variety of waveform types and customizable parameters like amplitude, frequency, and phase. Ideal for professionals and hobbyists for signal generation and circuit measurement.

Dual-channel signal generationMultiple waveform typesAdjustable amplitude, frequency, and phase
πŸ”§ Utilities
(28)
free with in-app purchases
7
Audio Function Generator PRO
Audio Function Generator PRO
Audio Function Generator PRO
Frequency and Signal Generator
$12.99

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.

Generate sine, square, triangular, and sawtooth tonesFrequency and volume sweep generationCustomizable presets and configurations
🎡 Music
(265)
free
8
Tone Gen Pro
Tone Gen Pro
Tone Gen Pro
Advanced tone generator
Free

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.

Generate single type signals (sine, square, noise)Create sweep (chirp) signals (linear/exponential)Generate click signals with adjustable duty cycle
πŸ”§ Utilities
(45)
free with in-app purchases
9
MultiTone Generator
MultiTone Generator
MultiTone Generator
Frequency and Signal Generator
Free

Generate a wide range of audio test tones, including sine, rectangular, triangular, and sawtooth waves. Explore frequency sweeps, noise generation, and customizable settings. Upgrade for advanced features like creating multiple tone combinations and extended frequency ranges.

Generate sine, rectangular, triangular, and sawtooth wavesPlay frequency sweep test tonesSweep repeat/wobble function
🎡 Music
(354)
free with in-app purchases
10
iFunctionGenerator
iFunctionGenerator
iFunctionGenerator
by Black Cat Systems
$2.99

This utility transforms your iOS device into a versatile audio function generator. Create up to 20 independent generators producing various waveforms and noise types, with precise control over frequency, volume, and phase for each channel. Save and recall your settings for quick access.

Multiple waveform generation (sine, triangle, sawtooth, square)Pink and white noise generationUp to 20 independent generators
πŸ”§ Utilities
(8)
paid
11
Brev AI Music & Song Generator
Brev AI Music & Song Generator
Brev AI Music & Song Generator
AI Music & Song Maker
Free

Instantly generate unique, high-quality music tracks with AI. Transform text into songs with or without lyrics, or create instrumental pieces in under a minute. Enjoy a free daily quota for experimentation and easily download or share your creations.

AI-powered music generationText-to-song creationInstrumental track generation
🎡 Music
(722)
freemium
12
Random Number Generator App
Random Number Generator App
Random Number Generator App
Number Generator, Randomizer
Free

Easily generate random numbers and sequences with customizable options. Set ranges, choose repeat or no-repeat modes, and manage your generated numbers with history and sharing features.

Generate random numbers in one tapCreate random number sequencesRepeat and no-repeat modes
πŸ”§ Utilities
(488)
free with in-app purchases
13
Random (Number Generator)
Random (Number Generator)
Random (Number Generator)
The #1 Random Number Generator
Free
$3.99 | 100% OFF

Instantly generate random numbers within a specified range. Ideal for decision-making, games, and quick outcomes. Features a clean interface for fast and simple results.

Generate random numbersSet custom rangesInstant results
πŸ”§ Utilities
(108)
free with in-app purchases
14
Random Things Generator
Random Things Generator
Random Things Generator
Generate Random Things
Free

Easily generate random numbers, cards, colors, dice rolls, and more. Create custom lists for unique generation needs. Features a clean interface and syncs across Apple devices.

Number GeneratorCard GeneratorCoin Flipper
πŸ”§ Utilities
(60)
free
15
Password Generator X
Password Generator X
Password Generator X
Fast & Secure Password Creator
Free

This app generates strong, unique passwords for online accounts. It allows users to specify password length and securely copies generated passwords with a single touch. Ideal for active internet users needing to protect their online presence.

Fast and secure password generationOne-touch password copyCustomizable password length up to 20 characters
πŸ”§ Utilities
(1.1K)
free with in-app purchases
16
Random Number Generator -TF427
Random Number Generator -TF427
Random Number Generator -TF427
Generate random numbers easy
Free
πŸ”§ Utilities
(0)
17
Number generator random, dice
Number generator random, dice
Number generator random, dice
Raffle lots, prizes and more
Free

Easily generate random numbers, create teams, randomize lists, pick winners for raffles, and roll dice. This versatile utility app offers multiple ways to make random selections for games, contests, or everyday decisions.

Generate random numbers with custom rangesCreate random teams from a list of namesRandomize the order of a list
πŸ”§ Utilities
(36)
ad-supported
18
Panecal Scientific Calculator
Panecal Scientific Calculator
Panecal Scientific Calculator
For engineers and students
Free

This app functions as a scientific calculator, enabling users to input and edit complex formulas with ease. It supports formula history, variable memory, and various number system conversions for accurate calculations.

Formula editing with cursor and swipeReuse past formulasVariable memory for calculations
πŸ”§ Utilities
(1.9K)
ad-supported
19
Boolean Algebra
Boolean Algebra
Boolean Algebra
From K-Map to circuit diagrams
Free

This app helps users understand and solve complex Boolean expressions. It allows for direct K-Map updates, truth table generation, and circuit diagram visualization. Users can interact with minimized circuits and learn about logic gates.

Resolve complex Boolean expressionsUpdate K-Map and derive minimized solutionsGenerate truth tables and corresponding circuits
πŸ“š Education
(24)
free
20
Random Balls - Shake Them!
Random Balls - Shake Them!
Random Balls - Shake Them!
Random number generator
Free

Generate sequences of random numbers using a physics-based simulation. Shake your device to let virtual balls collide and determine your random results. Offers multiple ball machines for diverse random data generation.

Physics-based ball simulationAccelerometer-driven collisionsMultiple unique ball machines
πŸ”§ Utilities
(202)
free with in-app purchases

FAQ about Function Generator

What are the best function generator apps for iPhone?
Audio Function Generator tops our function generator apps ranking as of July 2026, with a 4.7-star average from 2.1K App Store ratings, and it's free to download.
Yes β€” 18 of the top function generator apps we rank are free to download, including Audio Function Generator and Tone Generator: Audio Sound Hz.
Audio Function Generator has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 220+ function generator apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
This app functions as a powerful and intuitive tone and signal generator. It allows users to create and play various audio test tones, including sine, rectangular, triangular, and sawtooth waves. You can also generate frequency and volume sweeps, experiment with different types of noise, and save custom presets for quick access.
Key features include the ability to play standard test tones, perform frequency and volume sweeps, generate various noise types, and create/save custom presets. Advanced features, available with a PRO upgrade, extend the frequency range, sweep times, allow for individual channel selection, and enable multi-tone playback.

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