Nov 6, 2025 • 8 min read
By KOK-AI Research Team
“What is the AI app everyone is using?” — The most asked question in 2025. From students to CEOs, over 2 billion people now use AI tools monthly. Here’s your definitive guide to the top AI apps of 2025, backed by real data.
AI Adoption in 2025: The Numbers Don’t Lie
AI isn’t just a trend — it’s infrastructure.
| Metric | 2025 Stat |
|---|---|
| Global AI users | 2 billion+ (Menlo Ventures) |
| ChatGPT mobile users | 546M/month (Backlinko, Jan 2025) |
| AI app growth | 3x since 2023 (Statista) |
| Top regions | U.S., China, India, UK, Southeast Asia (↑ fastest) |
The 10 Most Popular AI Apps in 2025
1. ChatGPT (OpenAI) – The Universal Assistant
- Users: 500M+/month
- Best for: Writing, coding, brainstorming, automation
- Why it’s #1: GPT-4o + Apps SDK (run Spotify, Canva inside chat)
Plan Price Key Feature Free $0 GPT-4o mini, voice Plus $20/mo GPT-4o, web browsing Pro $200/mo Unlimited + advanced voice
2. Perplexity AI – The Research Engine
- Users: 10M+ active
- Best for: Fact-checked answers, citations, summaries
- Standout: Real-time web + source links
Plan Price Key Feature Free $0 Limited Pro searches Pro $20/mo Unlimited + image gen Max $200/mo No limits + Labs access
3. Claude (Anthropic) – The Ethical Enterprise AI
- Best for: Long-form writing, secure business use, tone control
- Why trusted: Privacy-first, no data training without consent
Plan Price Key Feature Free $0 Basic access Pro $20/mo Claude Code + integrations Max $200/mo Priority + memory tools
4. DALL·E 3 & Stable Diffusion 3.5 – AI Art Leaders
- Best for: Image generation, design, marketing visuals
- Key Upgrade: Stable Diffusion 3.5 NIM (NVIDIA) — 3x faster, local run on Ryzen AI
Tool Pricing DALL·E 3 (API) $0.04–$0.12/image Stable Diffusion Free (local) / $0.01/credit (API)
5. Canva Magic Studio – Design for Everyone
- Traffic: 278M visits/month
- Best for: Social media, presentations, branding
- AI Features: Magic Write, Text-to-Image, Background Remover
Plan Price Key Feature Free $0 5GB storage Pro $12.99/mo Magic Resize, Brand Kit 2025 Launch: Visual Suite 2.0 — AI Sheets, Charts, 31 cultural styles
6. Grammarly Docs – AI Writing Co-Pilot
- Best for: Emails, reports, academic writing
- New in 2025: 8 AI Agents (source finder, plagiarism, tone coach)
Plan Price Key Feature Free $0 Basic checks Pro $12/mo Plagiarism + 2,000 AI prompts
7. Microsoft Copilot – The Office AI
- Best for: Word, Excel, Teams, Outlook
- New: Reads Gmail, creates PDFs from prompts
Plan Price Personal $9.99/mo Copilot Add-on $30/user/mo
8. Optimo – AI Marketing Automator
- Best for: Ads, SEO, social captions
- New: Video scripts, Instagram Reels ideas
Plan Price Basic Free (25/day) Pro $29.99/mo
9. DeepL – Best AI Translator
- Languages: 30+
- Accuracy: Outperforms Google in tone & context
10. Remini – AI Photo Enhancer
- Best for: Restoring old photos, upscaling
- Viral on TikTok: “Turn 90s photos into HD”
How to Choose the Right AI App for You
| Goal | Recommended App |
|---|---|
| Writing & Research | Perplexity or Claude |
| Design & Social | Canva |
| Productivity | ChatGPT or Copilot |
| Marketing | Optimo |
| Image Creation | DALL·E or Stable Diffusion |
Pro Tip: Start with free tiers → test 2–3 tools → upgrade only what saves you >2 hours/week.
Final Thoughts: There’s No One AI App
The future isn’t one AI — it’s a toolkit.
In 2025, the smartest users combine tools:
- Perplexity → research
- ChatGPT → draft
- Canva → design
- Grammarly → polish
Your AI stack = your superpower.
Ready to build yours? Start exploring AI tools on KOK-AI.com →
Updated: Nov 6, 2025 | Sources: Statista, Backlinko, Menlo Ventures, Official Blogs