Comparison

TouchChat Discover vs Voice Spectrogram Logger

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

Head to head
About

TouchChat Discover

This app offers a risk-free way to explore a powerful communication solution before committing to a purchase. It provides a free trial of all features or access to lite-tech boards for individuals with speech difficulties.

Highlights
  • 30-day free trial of full features
  • Explore lite-tech WordPower boards
  • Augmentative and Alternative Communication (AAC)
  • Customizable vocabulary and messages
  • Built-in voice synthesizer
  • Multiple language options
Features
Read full description

Experience TouchChat® Discover, the new, risk-free way to try all the features of the popular TouchChat app before you buy. After downloading, you’ll have the option to start a free 30-day trial OR to explore the WordPower96 English and Spanish lite-tech boards. TouchChat is a full-featured Augmentative and Alternative Communication (AAC) solution for individuals who have difficulty using their natural voice. TouchChat is designed for individuals with Autism, Down Syndrome, ALS, apraxia, stroke, or other conditions that affect a person's ability to use natural speech. TouchChat gives an individual the ability to choose a vocabulary file which consists of pages and buttons that contain words, phrases, sentences, and other functions. Messages are spoken with a built-in voice synthesizer or by playing a recorded message. Various synthesized and custom voice options are available, allowing the user to choose a voice that fits their own personality. After your 30-day trial ends, you’ll have the option to purchase TouchChat HD w/WordPower®, TouchChat HD, or TouchChat HD Lite. If you don’t make a purchase, you’ll still have access to the WordPower96 English and Spanish lite-tech boards when your trial period ends. TouchChat provides multiple language options in a universal app supporting iPhone®, iPod touch® and iPad®. By downloading and using the TouchChat app, the purchaser accepts the PRC-Saltillo TouchChat Software License Terms. The Manufacturer of the iOS application – TouchChat Discover is: Prentke Romich Company dba PRC-Saltillo 1022 Heyl Rd Wooster, OH 44691 USA Tel.: (330) 262-1984 // (800) 262-1984 Fax: (330) 262-4829 Email: info@aacapps.com Web: www.prc-saltillo.com The EU Authorized European Representative for the iOS application – TouchChat Discover is: Prentke Romich GmbH Karthäuserstr. 3 D-34117 Kassel Germany Tel.: (05 61) 7 85 59-0 Fax: (05 61) 7 85 59-29 Email: info@prentke-romich.de Web : www.prentke-romich.de The UK Responsible Person for the iOS application – TouchChat Discover is: Liberator Ltd Glenside Business Park West Pinchbeck, Spalding, Lincolnshire, PE11 3SA UK Tel: +44 (0)1733 370470 Email: info@liberator.co.uk Web: www.liberator.co.uk/ The Swiss Authorized Representative for the iOS application – TouchChat Discover is: Inspera GmbH Thunstrasse 64 | CH-3110 Münsingen Phone +41 31 819 74 60 | Mobile +41 79 435 53 09 mail@inspera.ch | www.inspera.ch

About

Voice Spectrogram Logger

Visualize voice frequencies in a spectrogram from 20-2500Hz. Adjust display with sliders and log recordings to export as PNG files. Functions fully offline and supports background processing.

Highlights
  • Real-time voice spectrogram display
  • Adjustable frequency range (20-2500Hz)
  • Zoomable spectrogram with pinch gestures
  • Customizable spectrogram gradation
  • Logging mode with history export
  • Offline functionality
Features
Read full description

1. DESPLAY The spectrogram of voice is displayed in the range of 20 - 2500Hz. You can zoom in/out the spectrogram by pinching in/out smoothly. Also landscape orientation is supported. 2. USEFUL By moving "vivid" slider, the gradation of spectrogram is controlled. The gradation is also controlled by moving "baseline" slider in "Setting" tab and selecting "Mean" or "RMS" as the way of smoothing the spectrogram out. 3. LOGGING When "log" switch is ON, this app runs in the logging mode. To choose a past log from "History" tab, you can pull it from iPhone via email as a PNG file. 4. AVAILABLE Without cellular data service, the full functions are available. The background processing is supported. 5. TECHNICAL NOTE Sample rate: 44.1kHz Bit depth: 32bit float FFT window function: Blackman FFT samples: 4096

Screenshots

TouchChat Discover4 screens
Voice Spectrogram Logger4 screens

Verdict

The call

The clearest difference is rating: TouchChat Discover at 3.8 against Voice Spectrogram Logger's 3.0. TouchChat Discover also leads on update cadence (every 2 months vs every 15 months) and review sentiment (21% vs 0%). Voice Spectrogram Logger's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (15.5 vs 18.0). 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. TouchChat Discover sells 11 one-off in-app purchases and Voice Spectrogram Logger sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

TouchChat Discover holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: TouchChat Discover has 102 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 21% of TouchChat Discover's written reviews are positive against 0% of Voice Spectrogram Logger's.

UpkeepUpdate frequency

TouchChat Discover ships an update every 2 months, Voice Spectrogram Logger every 15 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
TouchChat Discover versus Voice Spectrogram Logger: the parameters behind the verdict, then further details
ParameterTouchChat DiscoverVoice Spectrogram Logger
PriceFreeFree
Rating3.8 (102 ratings) — better3.0 (2 ratings)
Positive reviews21.4% of reviews — better0.0% of reviews
Number of ratings102 — better2
Update frequencyEvery 2 months — betterEvery 15 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.5 — better
Further details — not scored
Size2.7 GB7 MB
Age rating4+12+
DeveloperPrentke Romich CompanyYukiko Iwai

Customer experience

TouchChat Discover

All ratings102 ratings
Positive67.6%
Neutral6.9%
Negative25.5%
Written reviews56 reviews
Positive21.4%
Neutral1.8%
Negative76.8%

Voice Spectrogram Logger

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

TouchChat Discover

Reported bugs

10 issues
  • App crashed when editing
  • New update broke paid license
  • Upgrade not working, logs out
  • App glitches and shuts down
  • App edits pictures without consent
Show 5 more
  • Will not download, storage issues
  • Does not work with iOS 16 and new iPhone
  • No access to 30 day trial after purchase
  • App crashes whole app
  • App has bugs, glitches, and lagging

Requested features

4 requests
  • Add scientific calculator with exponents, complex numbers & roots
  • Make it less expensive
  • Add teenage voices back
  • Add voice to free trial

Voice Spectrogram Logger

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

TouchChat Discover

One-time11
  • 30-Day Free TrialFree
  • Upgrade to TouchChat HD Lite$9.99
  • Talk-About Vocabulary$44.99
Show 8 more
  • PCS Symbol Library$49.99
  • Arabic Vocabulary Set$49.99
  • iShare 1-Year 2GB Subscription$59.99
  • Pixon® for TouchChat$79.99
  • Gateway© Vocabulary$149.99
  • WordPower Vocabulary$149.99
  • Upgrade - TouchChat HD$149.99
  • Upgrade TouchChat HD WordPower$299.99
1 purchases

Voice Spectrogram Logger

One-time1
  • Remove Ads$3.99

Questions

Is TouchChat Discover free?
TouchChat Discover is free to download, with in-app purchases available.
Is Voice Spectrogram Logger free?
Voice Spectrogram Logger is free to download, with in-app purchases available.
Which has better reviews, TouchChat Discover or Voice Spectrogram Logger?
TouchChat Discover is rated higher. TouchChat Discover averages 3.8 out of 5 from 102 ratings, while Voice Spectrogram Logger averages 3.0 from 2 ratings.
Do TouchChat Discover or Voice Spectrogram Logger have ads?
Neither TouchChat Discover nor Voice Spectrogram Logger shows ads.
Which is updated more often, TouchChat Discover or Voice Spectrogram Logger?
TouchChat Discover ships an update every 2 months, and Voice Spectrogram Logger every 15 months. Most recently, TouchChat Discover was updated on November 1, 2026 and Voice Spectrogram Logger on October 24, 2026.

Other comparisons