5 Best Free Office Apps for Android and iOS in 2026

Looking for a free office app that works on both Android and iOS in 2026? The short list below covers full suites that can open Word, Excel, and PowerPoint files, handle everyday editing, and keep documents in the cloud. Each pick is free to download; some unlock extra tools with optional upgrades.

Top 5 Best Free Office Apps for Android and iOS in 2026

We ranked these apps by Microsoft Office file compatibility, free editing depth, PDF support, cloud sync, and day-to-day usability on phones and tablets. If you need one all-in-one suite for documents, sheets, slides, and PDFs, start with WPS Office.

1. WPS Office

WPS Office is a free all-in-one office suite for Android and iOS with Writer, Spreadsheets, Presentation, and a built-in PDF toolkit. It opens and saves Microsoft Office formats, syncs files through WPS Cloud, and includes converters plus templates for resumes, reports, and school work.

Pros:

• Free to download and use for core Word, Excel, and PPT tasks

• Strong compatibility with Microsoft Office files

• PDF edit, convert, and annotate tools in one app

• Cloud storage and cross-device sync

• Optional WPS AI for drafting, summarizing, and rewriting

Cons:

• Some advanced PDF and AI features need a premium plan

• Older phones may feel slower with large files

Best for: Students and professionals who want one free app for docs, sheets, slides, and PDFs on both Android and iOS.

2. Microsoft 365 (Office Mobile)

Microsoft Word, Excel, and PowerPoint are free to install on Android and iOS. With a free Microsoft account you can create and edit files on phones and smaller tablets. Full desktop-class features, larger-screen editing limits, and extra cloud storage usually require a Microsoft 365 subscription.

Pros:

• Familiar interface for Microsoft Office users

• Free basic editing on mobile with a Microsoft account

• Strong formatting fidelity for .docx, .xlsx, and .pptx

• Frequent feature updates

Cons:

• Advanced features and some device sizes need Microsoft 365

• Not a true fully free suite for every use case

• Separate apps or modules can feel heavier than one suite

Best for: People already in the Microsoft ecosystem who mainly edit on phones.

3. Google Docs, Sheets, and Slides

Google's free Docs, Sheets, and Slides apps sync through Google Drive and work well for real-time collaboration. They are free with a Google account and handle shared school or team files smoothly, though offline depth and advanced desktop-style formatting trail dedicated suites.

Pros:

• Free with a Google account

• Excellent real-time collaboration and sharing

• Automatic cloud save in Google Drive

• Clean mobile apps for quick edits

Cons:

• Weaker offline and complex formatting than WPS or Microsoft

• PDF editing is limited compared with a full office suite

Best for: Shared documents, group projects, and cloud-first workflows.

4. Apple Pages, Numbers, and Keynote

On iPhone and iPad, Apple's Pages, Numbers, and Keynote are free and polished. They export to Microsoft formats, support iCloud sync, and feel native on iOS. Android users will need another option from this list.

Pros:

• Free on iPhone and iPad

• Clean templates and smooth touch editing

• iCloud sync across Apple devices

• Export to Word, Excel, and PowerPoint formats

Cons:

• Not available as a native Android suite

• Complex Microsoft files may need extra cleanup after export

Best for: iPhone and iPad users who want free native office apps.

5. OnlyOffice Documents

OnlyOffice Documents is a free mobile office option focused on accurate Word, Excel, and PowerPoint editing. It suits users who want open collaboration formats and solid OOXML support without paying for a premium suite on day one.

Pros:

• Free document, spreadsheet, and presentation editing

• Good Microsoft Office format support

• Useful for teams that already use OnlyOffice on desktop

Cons:

• Less polished than WPS or Apple iWork on mobile

• PDF and AI tools are not as complete as a full suite like WPS Office

Best for: Users who want a free OOXML-focused editor and may already use OnlyOffice elsewhere.

How to Choose a Free Office App in 2026

Use these practical checks before you install:

• File compatibility: Confirm the app opens your existing .docx, .xlsx, and .pptx files without breaking layout.

• True free limits: Check what stays free after sign-in. Microsoft mobile apps and Google Docs are free for basics; advanced tools may need a plan.

• PDF needs: If you annotate or convert PDFs often, prefer a suite with a built-in PDF toolkit such as WPS Office.

• Platform: iPhone users can lean on Apple iWork; Android-first users should pick WPS, Google, Microsoft, or OnlyOffice.

• Collaboration: Google Docs wins for live co-editing; WPS and Microsoft are stronger for offline-heavy work.

For most people who want one free install that covers documents, spreadsheets, presentations, and PDFs on both Android and iOS, WPS Office is the most complete choice on this list.

WPS Office with AI: Featured Productivity Upgrade

WPS AI sits inside WPS Office and helps with drafting, summarizing, rewriting, data checks, and PDF Q&A. It is useful when you need a first draft fast or want a cleaner summary of a long file.

What WPS AI can do:

• Content generation: Draft essays, presentations, and reports from a short prompt.

• Summarization: Pull key points from long documents.

• Data analysis: Spot trends and patterns in spreadsheet data.

• PDF chat: Ask questions about a PDF and get answers from the file.

• Writing polish: Check spelling, grammar, and improve formatting.

How to use WPS AI:

Step 1. Open a document in WPS Office.

Step 2. Tap the WPS AI button in the toolbar.

Step 3. Choose the feature you need, such as generate, summarize, or rewrite.

Step 4. Follow the on-screen prompts and review the result before you keep it.

FAQs

How can I install Microsoft Word on Android for free?

Step 1. Open the Google Play Store on your Android device.

Step 2. Search for Microsoft Word.

Step 3. Tap Install on the Microsoft Word app.

Step 4. Wait for the install to finish, open the app, and sign in with a free Microsoft account to use basic editing features.

Do you need to pay for an office app?

No. Many office apps are free to download and cover viewing, creating, and basic editing. WPS Office, Google Docs, and Apple Pages/Numbers/Keynote all offer free daily use. Microsoft Word, Excel, and PowerPoint are free to install on mobile, but some advanced features and device limits require Microsoft 365.

What is the best free office app for Android and iOS?

If you want one app that works on both Android and iOS with documents, spreadsheets, presentations, and PDF tools, WPS Office is the strongest all-in-one free option in this comparison. Google Docs is better for live collaboration, and Apple iWork is a strong free choice for iPhone and iPad only.

Can free office apps open Microsoft Word and Excel files?

Yes. WPS Office, Microsoft Office mobile apps, Google Docs/Sheets, Apple iWork, and OnlyOffice can open common Microsoft formats. Always re-check complex layouts, macros, and tracked changes after conversion or export.

Summary

The best free office apps for Android and iOS in 2026 still need to balance compatibility, free limits, and mobile usability. WPS Office stands out as a complete free suite with Word, Excel, PPT, PDF tools, and optional AI. Microsoft 365 apps, Google Docs, Apple iWork, and OnlyOffice remain solid alternatives depending on your device and collaboration needs. Start with WPS Office if you want one free install that covers most everyday work.