Comparison

Eterna vs ChatPDF AI

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

Head to head

Summarize, quiz, translate

Free

📊 Productivity

No ratingsView app →

About

Eterna

Features

Read full description

Eterna Kurumsal Yönetim Programı, Eterna INC. özelinde kurum içi yönetim süreçlerinin takibi için kullanılmaktadır.

About

ChatPDF AI

Features

Read full description

Turn PDFs and documents into clear answers, summaries, and study materials. Upload a PDF, DOCX, PPTX, or photo and ask questions in natural language. ChatPDF helps you understand long documents without reading every page. KEY FEATURES • Ask questions about any document • Get concise summaries and key points • Create quizzes and flashcards • Translate full documents • Scan paper pages with OCR • Understand text, charts, tables, and images • Compare multiple documents • Export notes, summaries, and highlights • Use voice input for hands-free questions Built for students, researchers, professionals, and anyone who works with long files. Turn lecture notes into a quiz, review a research paper, understand a report, or find an answer inside a document in seconds. Privacy Policy: https://sauceai.vercel.app/privacy Terms of Service: https://sauceai.vercel.app/tos

Screenshots

Eterna4 screens

ChatPDF AI4 screens

Verdict

The call

The clearest difference is in-app purchases: Eterna at none against ChatPDF AI's 5. ChatPDF AI's advantage is update cadence (every 8 days vs every 3 months). On price, ads, device support 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. ChatPDF AI sells 5 in-app purchases, starting at $4.99 per 7 days. Eterna asks for nothing beyond the download.

UpkeepUpdate frequency

Eterna ships an update every 3 months, ChatPDF AI every 8 days. The most recent releases landed on September 13, 2026 and September 10, 2026 respectively.

Scorecard2 real differences · 4 level

Eterna versus ChatPDF AI: the parameters behind the verdict, then further details
Parameter	Eterna	ChatPDF AI
Price	Free	Free
Update frequency	Every 3 months	Every 8 days — better
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	12.0	12.0
Further details — not scored
Size	42 MB	134 MB
Age rating	4+	4+
Developer	Eterna Inc.	nimet oz

In-app purchases

None

Eterna

No in-app purchases

5 purchases

ChatPDF AI

Subscriptions5

Weekly Pro$4.997 Days
Weekly Pro$6.997 Days
Monthly Pro$19.991 Month

Show 2 more

Yearly Pro$44.991 Year
Yearly Pro$89.991 Year

Questions

Is Eterna free?

Eterna is free to download, with no in-app purchases.

Is ChatPDF AI free?

ChatPDF AI is free to download, with in-app purchases available.

Do Eterna or ChatPDF AI have ads?

Neither Eterna nor ChatPDF AI shows ads.

Which is updated more often, Eterna or ChatPDF AI?

Eterna ships an update every 3 months, and ChatPDF AI every 8 days. Most recently, Eterna was updated on September 13, 2026 and ChatPDF AI on September 10, 2026.