Comparison

Synthy vs SmartEco

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

Head to head
About

Synthy

Transform documents, books, and web content into audio with advanced text-to-speech technology. Scan physical documents or import digital files and listen to them read aloud with natural-sounding AI voices. Adjust playback speed and enjoy background listening for a seamless audio experience.

Highlights
  • Scan and read documents
  • Text to speech with AI voices
  • Adjustable reading speed
  • Import files and web links
  • Background listening mode
  • Type and listen functionality
Features
Read full description

Introducing Synthy — Your Ultimate Audio Books & Reading App! Do you have a mountain of documents, books, or material to read but no time? Synthy is the perfect PDF reader, text to speech tool, and voice aloud reader to save your day! Simply scan and read, upload text, document or web-link and listen to any text aloud. Whether it’s book reading, articles, or newspapers, our app reads everything for you with natural TTS voices. Key Features of Synthy: Text to Speech & Voice Reader Transform any text into audio! Use your phone’s camera to scan and read books (PDF, EPUB, DOCX, etc.), and let Synthy read text aloud like a personal audio book reader. Perfect for multitasking or book reading on the go! Realistic AI Voices for Document Reader No more robotic sounds! Enjoy voice reader technology with lifelike voices. Whether for PDF read aloud, screen reader tasks, or reading apps, Synthy adapts to your style. Adjustable Speed Reading App Customize pacing for read aloud comfort. Speed up for quick reviews or slow down to savor content—ideal for audio books and document reader needs. Type & Listen with Voice Aloud Reader Need to read text aloud from notes? Type anything, and Synthy will turn text to voice instantly. Great for students and professionals! Import Files & Web Content Import PDFs, eBooks, or links—Synthy acts as a screen reader for all formats. Even online articles become audio books with our TTS! Background Mode Keep listening while your phone is locked. A must-have for book reading fans and voice reader enthusiasts! Why Choose Synthy? More than a PDF reader or text to speech tool, Synthy is your all-in-one voice aloud reader and audio book reader. Whether for scan and read convenience, read aloud flexibility, or document reader functionality. Book reading lovers Professionals needing PDF read aloud Anyone who wants a screen reader or voice reader to speak for me effortlessly! Privacy policy: https://speechie.app/privacy.html Terms of use: https://speechie.app/terms.html Support: • Email: support@speechie.app • FAQ: https://speechie.app/faq.html

About

SmartEco

Features
Read full description

SmartEco helps you monitor, analyze, and improve indoor air quality using real-time data from connected SmartEco IoT devices. Designed for homes, offices, schools, and commercial buildings, SmartEco provides clear insights that help you create healthier indoor environments. With SmartEco, users can track critical air quality parameters, visualize trends, and receive actionable insights through an intuitive dashboard. Facility managers can monitor multiple locations, while individual users can easily understand their indoor environment at a glance. Key Features: • Real-time indoor air quality monitoring • Supports PM2.5, PM10, CO₂, O₃, NO₂, CO, SO₂, and more • Live dashboards with historical trends • Multi-device and multi-location support • Smart alerts for unhealthy air conditions • Secure cloud-based data storage • Designed for homes, offices, schools, and smart buildings SmartEco empowers individuals and organizations to make informed decisions for healthier, safer, and more sustainable indoor spaces.

Screenshots

Synthy4 screens
SmartEco4 screens

Verdict

The call

The clearest difference is in-app purchases: SmartEco at none against Synthy's 7. SmartEco also leads on update cadence (every 10 days vs monthly) and device support (3 vs 1). On price, ads and iOS requirement 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. Synthy sells 7 in-app purchases, starting at $4.99 per 7 days. SmartEco asks for nothing beyond the download.

UpkeepUpdate frequency

Synthy ships an update monthly, SmartEco every 10 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Synthy versus SmartEco: the parameters behind the verdict, then further details
ParameterSynthySmartEco
PriceFreeFree
Rating4.2 (385 ratings) — better—
Positive reviews81.3% of reviews—
Number of ratings385 — better—
Update frequencyMonthlyEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.615.1 — better
Further details — not scored
Size213 MB23 MB
Age rating4+4+
DeveloperDating onlain, oooISPATIAL TECHNO SOLUTIONS PRIVATE LIMITED

Bugs and requests

Synthy

Reported bugs

4 issues
  • Scanning issues with page breaks
  • Playback pauses at paragraph ends
  • Inconsistent text recognition
  • Subscription cancellation problems

Requested features

5 requests
  • Highlight and annotate text
  • Background playback with screen lock
  • More language and voice options
  • Improved OCR accuracy
  • Easier file management and organization

SmartEco

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Synthy

Subscriptions7
  • Synthy Scan & Read Premium$4.997 Days
  • Endless Listening with Synthy$5.991 Month
  • Endless Listening with Synthy$9.991 Month
Show 4 more
  • Endless Listening with Synthy3 Days trial$12.991 Month
  • Three months$34.993 Months
  • 6 month premium3 Days trial$49.996 Months
  • Synthy Premium3 Days trial$79.991 Year
None

SmartEco

No in-app purchases

Questions

Is Synthy free?
Synthy is free to download, with in-app purchases available.
Is SmartEco free?
SmartEco is free to download, with no in-app purchases.
Do Synthy or SmartEco have ads?
Neither Synthy nor SmartEco shows ads.
Which is updated more often, Synthy or SmartEco?
Synthy ships an update monthly, and SmartEco every 10 days. Most recently, Synthy was updated on October 30, 2026 and SmartEco on October 25, 2026.

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