TGSpeechBox vs Sullivan A
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
TGSpeechBox
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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: โข 26 languages with natural-sounding speech โข Full VoiceOver integration โ use as your primary system voice โข 7 voice presets plus YAML-defined voice profiles โข Deep engine tuning: pitch mode, voice tone, formant sharpness, inflection, tremor, breathiness, and more โข Phoneme editor: fine-tune individual speech sounds with live preview โข Pronunciation dictionary: add custom word pronunciations with IPA override support โข Stress, compound, and character dictionaries for advanced control โข Export and share your customizations โข Adjustable sample rate (11025โ44100 Hz) โข Rate override and rate boost for VoiceOver โข Language lock: keep your preferred language regardless of system setting โข 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.
Sullivan A
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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
Verdict
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
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.
TGSpeechBox ships an update weekly, Sullivan A every 2 weeks. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.
| Parameter | TGSpeechBox | Sullivan A |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly โ better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 โ better | 17.6 |
| Further details โ not scored | ||
| Size | 33 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Tamas Geczy | TUAT Inc. |
In-app purchases
TGSpeechBox
No in-app purchases
Sullivan A
- Basic$9.991 Month
- Usage 50 Top-Up$0.99
- Usage 200 Top-Up$2.99
- Usage 500 Top-Up$6.99








