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Review basis

The AppDuo team prepared this review by analysing product features, official documentation and user feedback to help you understand its strengths, limitations and suitability for your needs.

11 reference sources

Information updated Nov 10, 2026

How we review
ChatGPT logo

ChatGPT Review

OpenAI's flagship AI assistant for writing, research, coding, images and voice

7.5/10

By · Updated

  • Web
  • iOS
  • Android
  • Windows
  • macOS
Freemium · $8.00/mo
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Decide at a glance

Our verdict

ChatGPT suits anyone who wants one versatile AI assistant, with a usable free tier and paid plans from $8 to $500 a month. The trade-offs are possible ads on Free and Go in some markets, vaguely defined allowances, and a very low Trustpilot score (1.6/5) driven by billing and support complaints.

Best for: People who want one assistant for writing, study, research and coding in a single app

Skip it if: People who dislike ads on cheap plans: Free and Go may show ads, while Plus and above stay ad-free

Pros

  • Free offers unlimited text chats (with abuse guardrails) plus limited image creation, voice and deep research
  • Many price points: Go $8, Plus $19.99 and Pro from $100 a month, plus Business and Enterprise for organisations
  • Apps for iOS, Android, Windows and macOS, with chat history synced across devices

Cons

  • Ads on Free and Go: tested in the US from January 2026, with visual ads next to image results since October 2026
  • Only 1.6/5 on Trustpilot from 3,958 reviews, with complaints about wrong answers, unexpected limits, hard-to-cancel subscriptions and hard-to-reach support
All pros and cons · Who is it for?

Pros

  • High store scores at huge scale: 4.8/5 from more than 12 million US App Store ratings and 1B+ Google Play downloads

Cons

  • A mixed privacy record: the March 2023 data exposure and a 15 million euro Italian fine (Dec 2024), which OpenAI said it would appeal
  • Pro is expensive ($100–$500/month), and the pricing page shows no amounts, so prices have to be looked up in app-store listings

Best for

  • Users who want to start free and step up to Go, Plus or Pro as their needs grow
  • Teams and companies that need per-seat Business or Enterprise plans

Skip it if

  • Users who need predictable quotas: the pricing page describes allowances only as "limited" or "expanded", with no numbers

Experience & key features

What is ChatGPT?

ChatGPT is OpenAI's AI assistant, launched on 30 November 2022 and, according to Wikipedia, reaching about 100 million monthly users two months later. You type or speak a question, attach photos or files, and get answers, drafts, code or images back. It runs on the web, iOS (released 18 May 2023), Android and desktop, with chat history synced across devices.

Key features

According to the official pricing page, Free includes unlimited text chats with caps on uploads, image creation, voice, deep research, memory and Codex. Plus adds advanced reasoning models, projects, scheduled tasks, custom GPTs and expanded Codex. Pro has three usage tiers, Pro reasoning, longer Codex sessions and context windows up to 400K. The App Store description highlights image generation and editing, real-time voice conversations and photo uploads for transcribing handwriting or identifying landmarks.

Pricing and value

The official pricing page doesn't show amounts, so the figures here come from the in-app purchase list on the US App Store: Go $8, Plus $19.99, and Pro at $100, $200 and $500 a month. On the Vietnamese App Store, Go is 132,000 ₫, Plus 499,000 ₫, Pro 100 is 2,849,000 ₫, Pro 200 is 4,999,000 ₫ and Pro 500 is 14,199,000 ₫. Business and Enterprise are billed per user, with Business starting at 2 seats. Free and Go may show ads, while Plus and above stay ad-free per 9to5Mac. Go at $8 is reasonable if you just need more headroom; Pro only pays off for very heavy users.

More analysis

Who it's for and how it compares

ChatGPT suits people who want one tool that does many things, with many price points. Gemini is tied closely to Gmail and Google Workspace, Claude is often chosen for long documents and coding, Perplexity leans toward cited search, and Microsoft Copilot sits inside Windows and Microsoft 365. Points to weigh are ads on cheap plans, allowances without numbers, past privacy incidents and widely criticised customer support.

Screenshots

First App Store product image of the ChatGPT iPhone app
First App Store product image of the ChatGPT iPhone app
Second App Store product image of the ChatGPT app
Second App Store product image of the ChatGPT app
Third App Store product image of the ChatGPT app
Third App Store product image of the ChatGPT app

Plans & pricing

Prices last verified Nov 10, 2026

Free

Free

Per the official pricing page: unlimited text chats (subject to abuse guardrails), with caps on uploads, image creation, voice, deep research, memory and Codex. GPT Instant context window of 27K. Per 9to5Mac, ads may appear on this plan in some markets.

Go

$8/mo

$8/month per the US App Store and 9to5Mac. Compared with Free: more messages, uploads, image creation and voice chats, plus longer memory; deep research and Codex stay limited. Context window 54K (Instant) and 256K (reasoning). The pricing page says this plan may include ads.

Plus

$19.99/mo

$19.99/month on the US App Store. Adds GPT-6 advanced reasoning, expanded deep research and Codex, projects, scheduled tasks, custom GPTs and early access to new features; limits still apply. Context window 54K (Instant) and 256K (reasoning).

Pro

$100/mo

The US App Store lists three tiers: Pro 100 ($100/month), Pro 200 ($200/month) and Pro 500 ($500/month). Per the pricing page, Pro adds Pro reasoning (GPT-6 Astra), longer Codex sessions, unlimited image creation and larger context windows (128K Instant, 400K reasoning). Monthly API credits are included, but the pricing page does not state the amount.

Business

Contact sales

Billed per user per month, minimum 2 users, with monthly or annual billing. The pricing page does not list a price.

Enterprise

Contact sales

Priced through sales on annual plans; alternative payment options such as invoicing are available.

Prices in Vietnam (VND)

  • Go₫132,000/mo
  • Plus₫499,000/mo
  • Pro 100₫2,849,000/mo
  • Pro 200₫4,999,000/mo
  • Pro 500₫14,199,000/mo
Sources
Free plan limits
Free gives unlimited text chats (subject to abuse guardrails); uploads, image creation, voice, deep research and other features are capped.
Free trial
No free trial
Cancellation & refunds

OpenAI's help center blocks automated access, so AppDuo could not read its refund terms. For plans bought through the App Store, Apple handles refunds under its own policy.

Privacy

The ChatGPT homepage states that conversations may be reviewed and used to improve the AI models, and links to a help article on data use and a cookie preferences page. Since 16 Jan 2026 OpenAI has been testing ads for Free and Go users in the US; per 9to5Mac, OpenAI says conversations are not shared with advertisers, ads do not influence answers, and ads are not shown to under-18 accounts or next to sensitive topics. Track record: in March 2023 a bug exposed conversation titles and, according to Wikipedia, OpenAI later confirmed that names, emails and partial payment details of some users were also exposed. On 20 Dec 2024 Italy's data protection authority fined OpenAI 15 million euros for training on personal data without an adequate legal basis, for transparency failures and for not notifying the breach; OpenAI said it would appeal. AppDuo could not read the full privacy policy (openai.com/privacy), so check training opt-outs and retention periods in the app settings yourself.

Official pricing page

ChatGPT alternatives

ChatGPT logoVSGemini logoChatGPT vs GeminiChatGPT logoVSDeepSeek logoChatGPT vs DeepSeekChatGPT logoVSClaude logoChatGPT vs Claude
Gemini logo7.5/10

Gemini

Google's AI assistant, tied into Gmail, Drive, Android and Google storage plans

Freemium
Claude logo7.4/10

Claude

Anthropic's AI assistant, strong for coding and writing, with tight usage limits

Freemium
All alternatives

Frequently asked questions

Is ChatGPT free?

Yes. Free offers unlimited text chats (subject to abuse guardrails), while uploads, image creation, voice and deep research are capped. It may show ads in some markets.

How much is ChatGPT Plus?

Plus is $19.99/month on the US App Store and 499,000 ₫/month on the Vietnamese App Store. Both stores also list a second, much pricier Plus entry ($200 and 4,999,000 ₫) without stating the billing period.

How does ChatGPT Go differ from Plus?

Go is $8/month, adds headroom over Free and may show ads. Plus adds GPT-6 advanced reasoning, expanded deep research and Codex, projects and custom GPTs, without ads.

Does ChatGPT use my chats for training?

The ChatGPT homepage says conversations may be reviewed and used to improve the models. AppDuo could not read the full policy at the time of writing, so check the data controls in your account settings.

Review evidence & sources11

Scores

Ease of use
8.6
Why this score

A simple chat interface, history synced across devices, 60 interface languages and 4.8/5 from over 12 million US App Store ratings. Marked down because the growing number of features and plan tiers makes it hard for newcomers to tell what each plan includes.

Features
9.0
Why this score

The broadest toolset in the category: chat, advanced reasoning, deep research, image generation and editing, voice, memory, projects, scheduled tasks, custom GPTs, Codex and business plans. Few rivals match the full set, though many features are gated by plan.

Value for money
7.6
Why this score

Free is generous with unlimited text chat and Go is only $8. Plus at $19.99 is the going rate for the category, but Pro at $100–$500 is expensive, allowances are vague and Free/Go carry ads.

Performance
8.3
Why this score

OpenAI ships new models constantly (GPT-4o in May 2024, GPT-5 in Aug 2025, GPT-6 Sol and Luna in Sep 2026 per TechCrunch) and Pro offers context windows up to 400K. But Trustpilot reviewers report wrong answers and surprise limits, and no independent benchmark data was read for this review.

Support
5.8
Why this score

There is a help center. But Trustpilot reviewers say it is hard to reach a human or track a case, and duplicate accounts keep being billed; 74% of ratings there are 1-star.

Privacy & security
5.9
Why this score

The homepage says conversations may be used to improve models; ads on Free and Go come with a pledge not to share chats with advertisers. Marked down for the March 2023 exposure and the 15 million euro Italian fine, which included not notifying the breach. The full policy could not be read, so no credit is given for data controls.

What users say

Sources

Specs & compatibility
Developer
OpenAI
Headquarters
United States
Launched
2022
Category
AI

Capabilities

  • AI features
  • Mobile app
  • Integrations
  • Real-time collaboration

Platforms

  • Web
  • iOS
  • Android
  • Windows
  • macOS

Interface languages

  • English
  • Vietnamese
  • Japanese
  • Chinese
  • Spanish
  • French
  • Korean
  • German
  • Portuguese
  • Russian
  • Thai
  • Indonesian

Integrations

  • Codex
  • Deep research
  • Custom GPTs
  • Epic (ChatGPT Health)

Support

  • Help center
  • Email
  • Community forum

Change history

  1. Feature.OpenAI launches visual ads that appear alongside image generation results.
  2. Limits.ChatGPT brings unlimited text chats to free users.
  3. Price.ChatGPT Go launches worldwide at $8/month and OpenAI announces ad tests for Free and Go users in the US.
Full change history (8)
  1. Feature.OpenAI releases the GPT-5 model.
  2. Company.Italy's data protection authority fines OpenAI 15 million euros for training on personal data without a legal basis, transparency failures and not reporting the March 2023 breach; OpenAI says it will appeal.
  3. Launch.The official ChatGPT iOS app is released on the App Store.
  4. Company.A bug lets some users see others' conversation titles; OpenAI later confirms names, emails and partial payment details were also exposed. Italy's data protection authority temporarily bans ChatGPT and opens an investigation.
  5. Launch.OpenAI releases ChatGPT; roughly two months later it reaches 100 million monthly users, per Wikipedia.
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