Comparison

TGSpeechBox vs Sullivan A

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

Head to head
About

TGSpeechBox

Features
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TGSpeechBox is a high-quality speech synthesizer that works as a system voice with VoiceOver and as a standalone text-to-speech app. Features: โ€ข 26 languages with natural-sounding speech โ€ข Full VoiceOver integration โ€” use as your primary system voice โ€ข 7 voice presets plus YAML-defined voice profiles โ€ข Deep engine tuning: pitch mode, voice tone, formant sharpness, inflection, tremor, breathiness, and more โ€ข Phoneme editor: fine-tune individual speech sounds with live preview โ€ข Pronunciation dictionary: add custom word pronunciations with IPA override support โ€ข Stress, compound, and character dictionaries for advanced control โ€ข Export and share your customizations โ€ข Adjustable sample rate (11025โ€“44100 Hz) โ€ข Rate override and rate boost for VoiceOver โ€ข Language lock: keep your preferred language regardless of system setting โ€ข Runs entirely on-device โ€” no internet required, no data leaves your phone TGSpeechBox uses a Klatt-style formant synthesis engine with eSpeak-ng for phoneme generation. It is open source under the MIT license. Built by a blind developer, designed for accessibility from day one.

About

Sullivan A

Features
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Using Sullivan A specialized in document. Among the functions of Sullivan Plus that you are using usefully, we pulled out the document function and expanded/specialized it! Named Sullivan A! Exciting - Sullivan's new transformation continues! Take a picture and view the document with Sullivan A and check it out. Separately display the entire content and summary content of the document! With AI's summary, you can check the entire document faster than anyone else and search by words. Let's take an example. If the document contains the word 'puppy ', type in a puppy. Sullivan A will find out and inform which paragraph the puppy is in. Take pictures of business cards and receipts with Sullivan A! You can save the contact information of the business card to your mobile phone, and you can check the contents of the business card separately. When you take a picture of a receipt, the item and amount of the receipt are announced by voice. And, you can also convert the letters of PDFs made from images to TEXT! You can check the contents in a summary / full view, and you can search as mentioned above. [Main functions] AI analyzes the form of the document and guides it automatically. Recognize the content of the document and informs you by dividing it into summary/full, and you can search for words included in the document. You can save what you recognize and check it again later. If you recognize the business card, you can save the contact to your phone. You can recognize the receipt, search for the product included in the receipt, and check the amount. Recognizes image PDFs, converts them to TEXT, and displays summary/full contents separately. You can search for words in the PDF. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

TGSpeechBox2 screens
Sullivan A4 screens

Verdict

The call

The clearest difference is in-app purchases: TGSpeechBox at none against Sullivan A's 4. TGSpeechBox also leads on update cadence (weekly vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Sullivan A sells 4 in-app purchases, starting at $9.99 per month. TGSpeechBox asks for nothing beyond the download.

UpkeepUpdate frequency

TGSpeechBox ships an update weekly, Sullivan A every 2 weeks. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

Scorecard2 real differences ยท 4 level
TGSpeechBox versus Sullivan A: the parameters behind the verdict, then further details
ParameterTGSpeechBoxSullivan A
PriceFreeFree
Update frequencyWeekly โ€” betterEvery 2 weeks
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 โ€” better17.6
Further details โ€” not scored
Size33 MB60 MB
Age rating4+4+
DeveloperTamas GeczyTUAT Inc.

In-app purchases

None

TGSpeechBox

No in-app purchases

4 purchases

Sullivan A

Subscriptions1
  • Basic$9.991 Month
One-time3
  • Usage 50 Top-Up$0.99
  • Usage 200 Top-Up$2.99
  • Usage 500 Top-Up$6.99

Questions

Is TGSpeechBox free?
TGSpeechBox is free to download, with no in-app purchases.
Is Sullivan A free?
Sullivan A is free to download, with in-app purchases available.
Do TGSpeechBox or Sullivan A have ads?
Neither TGSpeechBox nor Sullivan A shows ads.
Which is updated more often, TGSpeechBox or Sullivan A?
TGSpeechBox ships an update weekly, and Sullivan A every 2 weeks. Most recently, TGSpeechBox was updated on October 17, 2026 and Sullivan A on October 24, 2026.

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