PDF Viewer by Nutrient vs TeraStudy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Viewer by Nutrient
Easily view, search, and annotate PDF documents on your iPhone and iPad. Import files from cloud services, fill out forms, add signatures, and organize your documents. Advanced features like redaction and combining documents are available with a Pro subscription.
- View and search PDFs
- Annotate with highlights and notes
- Sign documents digitally
- Fill out PDF forms
- Organize and share documents
- Import from cloud services
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PDF Viewer is a fast and beautiful app, allowing you to view, search, and annotate PDF documents with ease on your iPhone and iPad. Access your files from iCloud, Dropbox, Box, OneDrive, Google Drive or any other cloud solution via Apple's familiar Document Browser interface. +++ Listed as “Productivity lifesaver” on the App Store +++ "A streamlined interface packed with powerful features - it’s like having a desktop-quality PDF toolkit wherever we go" – App Store Editor Notes “I'm impressed by how the folks at PSPDFKit have been able to fine-tune the document browser to the app's needs.” – MacStories.net "If you want a PDF viewer that is designed for reading PDF books, this is it." – App Review VIEW DOCUMENTS ON THE GO • Easily import a PDF from your favorite cloud service provider, email, or directly off a website. • Supports Open In Place, Drag & Drop and features the familiar Apple Document Browser interface from the Files app. • Search for the exact text you are looking for within the document. • Double tap on the screen to Smart Zoom directly to the text you want to read. • Annotate images (JPEG, PNG) non-destructive, just like PDF documents. (PRO) ANNOTATE WITH EASE • While reviewing a document, use your finger or Apple Pencil to highlight and markup text. • Leave comments by adding a note, text, or drawing directly on the PDF. • Add images or audio. • Reply to notes. (PRO) SIGN DOCUMENTS ANYWHERE • Add your signature to any document using your finger or Apple Pencil. • Move and resize your signature as needed. • Flatten a document to ensure the signature doesn’t change. CREATE AND EDIT PDFs • Create new documents from existing documents by moving, rotating, deleting, or adding new pages. • Combine multiple documents into a single one. (PRO) • Add bookmarks to easily return to certain pages in large documents. FILL OUT FORMS • Quickly fill out PDF Forms by adding text to the fields. • Flatten and secure the form once you’re done to ensure the document doesn’t change. • Add a signature to any Form. STORE, ORGANIZE AND SHARE • Store documents, create folders and organize your documents. • Share documents by printing, emailing or saving your edits back any cloud service. PASSWORD PROTECT DOCUMENTS • Read document metadata, title and keywords. • Protect documents with user and owner passwords and limit permissions. (PRO) AND SO MUCH MORE • Conveniently switch to night mode when viewing your documents at night. • Present on external screens without the distraction of toolbars. (PRO) • Have the text from a PDF read out loud to you with text-to-speech. • PDF Viewer remembers where you were down to the page/position where you left off - even across devices. PRICING PDF Viewer comes with a large feature set, completely free. Some advanced features require the purchase of PDF Viewer Pro, available as a subscription. We offer 3-monthly and yearly subscription plans. There’s also a fully functional 7-day trial, so you can test PDF Viewer Pro (including document merging and password editing) before you commit. All plans unlock the app on iPhone and iPad. TRUSTED BY COMPANIES YOU KNOW PDF Viewer is built on top of and powered by PSPDFKit, the same PDF engine trusted around the world by companies like Dropbox, Box, IBM, Atlassian, SAP, and Lufthansa. BE PART OF THE PDF VIEWER COMMUNITY pdfviewer.io twitter.com/pdfviewerapp LEGAL Duration and price of each subscription are displayed in PDF Viewers’ storefront, updated at the time of purchase. Payment will be charged to iTunes account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off no later than 24 hours before the end of the current period. Subscriptions and auto-renewal can be managed/turned off in the iTunes account settings. Any unused portion of a free trial period is forfeited as soon as a subscription is purchased. Terms of Use: https://pdfviewer.io/terms Privacy Policy: https://pdfviewer.io/privacy
TeraStudy
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TeraStudyとは? 学習アプリの種類が多すぎて迷っていませんか? 複数の科目を1つのアプリで学びたいと思ったことはありませんか? TeraStudyはそんなお悩みを解決するために生まれた試験型学習教育アプリです。 スキマ時間を活用して学習することで、持続的なスキルアップを目指せます。 主な特徴: - 多岐にわたる学習コンテンツ 「ビジネスマナー」「動画作成」「プログラミング」など、幅広い分野の学習コンテンツを提供しています。 - 多様な学習形式 一問一答形式、動画、文章形式の学習コンテンツを通じてインプットし、さらに実際のテストでアウトプットすることが可能です。 - 充実した復習機能 テストで間違えた問題は、付箋やメモ機能を使って効率的に復習できます。 - 学習のPDCAサイクルを1つのアプリで実現 TeraStudyを活用することで、計画、実行、確認、改善の学習サイクルをこのアプリ1つで完結できます。 法人向け利用 法人向けでは、Web版を活用して組織管理者が自作のコンテンツをアップロードし、組織員に公開することで、社内コンテンツのデータベースとしてご利用いただけます。 また、組織員の学習進捗やテスト結果を管理することが可能で、以下のようなメリットがあります: - コンテンツの社内定着度を測定:社内でのコンテンツ理解度を数値化できます。 - データを基にした正確な評価:学習・テスト結果を基に、適切な人材評価が可能です。 法人利用をご希望の方は、ワンダフルフライ株式会社のホームページよりお問い合わせください。 TeraStudyは、個人の学習から法人での教育管理まで幅広く活用できる次世代の学習ツールです。
Screenshots
Verdict
The clearest difference is in-app purchases: TeraStudy at none against PDF Viewer by Nutrient's 2. TeraStudy also leads on update cadence (every 5 days vs monthly) and iOS requirement (11.0 vs 17.0). PDF Viewer by Nutrient's advantage is device support (4 vs 2). On price and ads 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
Both are free to download. PDF Viewer by Nutrient sells 2 in-app purchases, starting at $6.99 per 3 months. TeraStudy asks for nothing beyond the download.
PDF Viewer by Nutrient ships an update monthly, TeraStudy every 5 days. The most recent releases landed on October 19, 2026 and October 10, 2026 respectively.
| Parameter | PDF Viewer by Nutrient | TeraStudy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (9.1K ratings) — better | — |
| Positive reviews | 73.4% of reviews | — |
| Number of ratings | 9.1K — better | — |
| Update frequency | Monthly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Mac, Vision Pro — better | iPhone, iPod |
| Requires iOS | 17.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 112 MB | 89 MB |
| Age rating | 4+ | 4+ |
| Developer | PSPDFKit GmbH | ワンダフルフライ株式会社 |
Bugs and requests
PDF Viewer by Nutrient
Reported bugs
4 issues- Annotations randomly disappearing or not saving
- Incompatibility issues with certain PDF files
- Scrolling and panning problems on large PDFs
- Unexpected crashes after iOS updates
Requested features
5 requests- Add a rubber/eraser tool for annotations
- Implement a side-by-side PDF view mode
- Improve palm rejection and gesture support
- Allow customization of toolbar and shortcuts
- Provide better options for PDF file management
TeraStudy
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PDF Viewer by Nutrient
- PDF Viewer Pro 3 Months7 Days trial$6.993 Months
- PDF Viewer Pro Yearly7 Days trial$19.991 Year
TeraStudy
No in-app purchases
Questions
Is PDF Viewer by Nutrient free?
Is TeraStudy free?
Do PDF Viewer by Nutrient or TeraStudy have ads?
Which is updated more often, PDF Viewer by Nutrient or TeraStudy?
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