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Best Deep Search AI Free Apps

249+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated September 2026

From beginner-friendly picks to power-user tools, our deep search ai free list covers 249+ iPhone apps updated through September 2026. Compare ratings, prices, and screenshots in one place.

Compare top Deep Search AI Free Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1OneSearch: DeepSearch FinderOneSearch: DeepSearch FinderFree4.6β˜… (1.4K)YesYesSep 2026
2DeepSeek - AI AssistantDeepSeek - AI AssistantFree4.0β˜… (11K)NoNoSep 2026
3Perplexity - AI Search & ChatPerplexity - AI Search & ChatFree4.8β˜… (505K)NoYesSep 2026
4Deepsearch-AI Search AssistantDeepsearch-AI Search AssistantFree2.5β˜… (12)NoYesAug 2026
5ChatGPTChatGPTFree4.8β˜… (10M)YesYesSep 2026
6Deep Truth AI SearchDeep Truth AI SearchFree4.0β˜… (21)NoYesSep 2026
7Ambitious SearchAmbitious SearchFreeβ€”YesNoAug 2026
8DeepFind - AI Search AssistantDeepFind - AI Search AssistantFreeβ€”YesYesMay 2026

Top Picks for Deep Search AI Free

OneSearch: DeepSearch Finder#1

OneSearch: DeepSearch Finder by Tung To Dinh

AI Chat, Deep Search Assistant
Editor's Choice
πŸ“Š Productivity
4.6😐(1.4K ratings)
FreeAdsIn-App Purchases
#89in Productivity
OneSearch: DeepSearch Finder screenshot 1
OneSearch: DeepSearch Finder screenshot 2
OneSearch: DeepSearch Finder screenshot 3
OneSearch: DeepSearch Finder screenshot 4
OneSearch: DeepSearch Finder screenshot 5
OneSearch: DeepSearch Finder screenshot 6

This AI-powered app acts as both a conversational assistant and a deep research tool. It helps users understand complex topics, answer questions, and conduct in-depth research by analyzing information from multiple sources and providing clear summaries. Additional features include math solving, image-based search, and voice chat.

What We Love

  • πŸš€ Powerful AI tool
  • πŸ‘ Helpful for business and personal tasks
  • πŸ™ Grateful for the platform

Room to Improve

  • πŸ”’ Limited free access
  • πŸ’° Expensive premium subscription
  • πŸ› Bugs and technical issues
DeepSeek - AI Assistant#2

DeepSeek - AI Assistant by ζ­ε·žζ·±εΊ¦ζ±‚η΄’δΊΊε·₯ζ™Ίθƒ½εŸΊη‘€ζŠ€ζœ―η ”η©Άζœ‰ι™ε…¬εΈ

Intelligent AI Assistant
Strong Contender
πŸ“Š Productivity
4.0😊(11K ratings)
Free
#38in Productivity
DeepSeek - AI Assistant screenshot 1
DeepSeek - AI Assistant screenshot 2
DeepSeek - AI Assistant screenshot 3
DeepSeek - AI Assistant screenshot 4
DeepSeek - AI Assistant screenshot 5

This AI assistant offers free, intelligent help powered by a cutting-edge model. It provides rapid responses and advanced capabilities to enhance problem-solving and daily efficiency.

What We Love

  • πŸš€ Fast and responsive
  • πŸ‘ User-friendly interface
  • πŸ’‘ Powerful AI capabilities
  • πŸ€– Impressive reasoning and thought process
  • πŸ’° Free and open-source

Room to Improve

  • πŸ€– Censorship and bias in responses
  • πŸ”Œ Server overload and slow response times
  • πŸ”’ Privacy concerns regarding data collection
  • πŸ› Occasional bugs and crashes
Perplexity - AI Search & Chat#3

Perplexity - AI Search & Chat by Perplexity AI, Inc.

Ask. Research. Trusted Answers
Worth Considering
πŸ“Š Productivity
4.8😊(505K ratings)
FreeIn-App Purchases
#6in Productivity
Perplexity - AI Search & Chat screenshot 1
Perplexity - AI Search & Chat screenshot 2
Perplexity - AI Search & Chat screenshot 3
Perplexity - AI Search & Chat screenshot 4
Perplexity - AI Search & Chat screenshot 5
Perplexity - AI Search & Chat screenshot 6

Get accurate, source-backed answers to any question with this AI-powered search and chat tool. It leverages top AI models for deep research, drafting emails, and more, syncing across devices. Discover new information and organize your findings in a personal library.

What We Love

  • πŸš€ Saves time, fast and efficient
  • πŸ” Comprehensive and detailed answers
  • πŸ“š Provides sources and citations
  • πŸ€– Excellent AI-powered search
  • 🧠 Helpful for research and learning
  • πŸ”’ Accurate mathematical and technical information
  • 🀝 Personalized and contextual responses

Room to Improve

  • πŸ› Occasional bugs and glitches
  • πŸ”’ Restrictions on VPN usage
  • πŸ’° Expensive subscription
  • πŸ€– Inconsistent or biased responses
  • πŸ–₯️ Subpar mobile app experience compared to web version

More Deep Search AI Free apps to explore

FAQ about Deep Search AI Free

What are the best deep search ai free apps for iPhone?
OneSearch: DeepSearch Finder tops our deep search ai free apps ranking as of September 2026, with a 4.6-star average from 1.4K App Store ratings, and it's free to download.
OneSearch: DeepSearch Finder shows ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ deep search ai free apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
One AI is an intelligent application that combines an AI assistant with a deep search engine. It helps users explore knowledge, answer complex questions, conduct in-depth research, and understand topics more clearly. It also offers features like AI math solving, image-based search, and voice chat.
Key features include an AI Assistant Chat for contextual conversations, AI Deep Search for analyzing information across multiple sources and synthesizing insights, AI Math Solving for step-by-step problem explanations, Image-Based Search for visual queries, and Voice Chat AI for natural language interaction.