Comparison

Speak Unit vs StringLab

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

Head to head
About

Speak Unit

This audio extension synthesizes speech for music production. Input up to twelve phrases, each triggered by a specific musical note, to add robotic vocals to your compositions. It's ideal for creating unique vocal effects in music software.

Highlights
  • Speech synthesis audio extension
  • Phrase input up to twelve entries
  • Note-triggered phrase playback
  • Voice selection
  • Standalone app for auditioning
Features
Read full description

Speak Unit is a speech synthesiser audio extension for use in Garageband and other compatible music software. You enter up to twelve phrases that are each triggered by a unique note. Ideal if you need robotic vocal for your musical compositions, or any other creative uses. To use - Add the Speak Unit audio extension instrument to a track in your music software - Select a note using the up and down buttons on the Speak Unit's chest. - Enter a phrase - Choose a voice - Press the save button to store the phrase in the Speak Unit ready for synthesising. - Press the speak button if you wish to audition the phrase. - Play or sequence that note to play the phrase in your composition. The stand alone app can be used to speak the phrases triggered by a row of note buttons.

About

StringLab

This app is a digital synthesizer that uses physical string modeling to recreate the sounds of various instruments, particularly plucked or hammered strings. It allows users to explore acoustic physics and create unique instrument textures through extensive parameter experimentation.

Highlights
  • Karplus-Strong physical modeling
  • Exciter Impact and Noise modes
  • Resonator objects with feedback
  • Frequency Dispersion support
  • External live input
  • Preset randomizer and manager
  • Drag & Drop preset export
Read full description

StringLab is a physical string modeling synthesizer based on Karplus-Strong theory. It is capable of reproducing the sounds of many different types of instruments, but is especially useful in the reproduction of hammered or plucked strings and other types of percussive instruments. It works by passing carefully crafted waveforms and short bursts of white noise through a series of tuned delay lines. The delay lines have an internal feedback loop with a series of filters to mimic the natural decay of harmonics found in a real instrument. StringLab allows you to discover the character of real-world accoustics, exploring the physics of how materials interact. Many new and original textures are born out of experimenting with the settings, so don't be afraid to experiment and create your own unique and dynamic instruments. Features •Karplus Strong based physical modeling. •Exciter Impact with multiple modes. •Exciter Noise with many envelope driven filters. •2 resonator objects with feedback. •8 bands per object with inversion. •4 Coupling modes. •Supports Frequency Dispersion. •Feedback low/high Damping. •Per object Body Filter. •Pitch Deformity. •External live input mode. •Preset randomiser. •Build it Preset Manager & Favourites. •Search Presets. •Drag & Drop preset export of presets. •Supports Color Sets.

Screenshots

Speak Unit1 screens
StringLab4 screens

Verdict

The call

The clearest difference is price: Speak Unit at $0.99 against StringLab's $14.99. Speak Unit also leads on rating (4.8 vs 4.3) and review sentiment (67% vs 57%). StringLab's advantage is update cadence (every 10 days vs every 52 months). On ratings volume, ads, in-app purchases and monetization model 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

Speak Unit costs $0.99 and StringLab $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Speak Unit holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 9 and 14 respectively. Written reviews point the same way: 67% of Speak Unit's written reviews are positive against 57% of StringLab's.

UpkeepUpdate frequency

Speak Unit ships an update every 52 months, StringLab every 10 days. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 6 level
Speak Unit versus StringLab: the parameters behind the verdict, then further details
ParameterSpeak UnitStringLab
Price$0.99 — better$14.99
Rating4.8 (9 ratings) — better4.3 (14 ratings)
Positive reviews66.7% of reviews — better57.1% of reviews
Number of ratings914 — better
Update frequencyEvery 52 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size153 MB45 MB
Age rating4+4+
DeveloperRick Peacock4Pockets.com

Customer experience

Speak Unit

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews9 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

StringLab

All ratings14 ratings
Positive78.6%
Neutral7.1%
Negative14.3%
Written reviews7 reviews
Positive57.1%
Neutral14.3%
Negative28.6%

In-app purchases

None

Speak Unit

No in-app purchases

None

StringLab

No in-app purchases

Questions

Is Speak Unit free?
Speak Unit costs $0.99, with no in-app purchases.
Is StringLab free?
StringLab costs $14.99, with no in-app purchases.
Which has better reviews, Speak Unit or StringLab?
Speak Unit is rated higher. Speak Unit averages 4.8 out of 5 from 9 ratings, while StringLab averages 4.3 from 14 ratings.
Do Speak Unit or StringLab have ads?
Neither Speak Unit nor StringLab shows ads.
Which is updated more often, Speak Unit or StringLab?
Speak Unit ships an update every 52 months, and StringLab every 10 days. Most recently, Speak Unit was updated on October 4, 2026 and StringLab on October 3, 2026.

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