- Start with the job, not the app
- General assistants you can talk to
- Search that answers in sentences
- Writing help on the go
- Capturing meetings, notes and voice memos
- Photos, images and video
- Learning, study and languages
- Free or paid: when upgrading makes sense
- Using AI apps for work on your phone
- A privacy check before you install anything
- How to test an AI app in ten minutes
- For businesses choosing apps for a team
- Frequently asked questions
The best AI app depends on the job you want done. General assistants handle questions and drafts, answer engines cite sources, transcription apps capture meetings, and image apps fix photos. Pick one job, test one app on a real task and check its privacy settings.
Search for the best AI app and you'll get lists that crown one winner, as if a busy parent, a student and a sales manager all need the same thing on their phone. They don't. The useful question is which job you want an app to do, then which apps do that job well. This guide is organised that way. Within each job, apps are listed in alphabetical order, not ranked, because the right one depends on the phone you use, the accounts you already have and what you're comfortable sharing.
Start with the job, not the app
Most people who try AI on their phone want one of six things: an assistant to ask questions, help with writing, a way to capture and summarise conversations, image and photo help, a study or language helper, or a search engine that answers in full sentences. Pick the job you'd use most, install one app for it and live with it before adding more.
General assistants you can talk to
These are the all-rounders. You can type or speak, ask follow-up questions, upload a photo or document and get an answer in seconds. Most have a free version with limits and a paid plan that unlocks newer models and more usage.
- ChatGPT: a general assistant with voice conversations, image understanding and the ability to work with files.
- Claude: strong at long documents and careful writing, with a clean mobile app.
- Gemini: Google's assistant, which connects with Google apps such as Gmail, Calendar and Docs if you allow it.
- Microsoft Copilot: built around Microsoft accounts and handy if your work lives in Microsoft tools.
If you're choosing between the big assistants for marketing tasks, I've compared them in my guide on when to use ChatGPT, Claude or Gemini.
Search that answers in sentences
Answer engines read the web for you and reply with a summary and links to sources. They're useful when you want a quick answer you can check, rather than a page of blue links.
- Google's AI features in search: summaries at the top of some results inside the Google app.
- Perplexity: an answer engine that shows its sources and lets you follow up on any answer.
Always tap through to the sources on anything important. Summaries can be wrong, and the source tells you whether to trust them.
Writing help on the go
Writing apps sit inside your keyboard or your email and help with tone, spelling and rewrites. They're useful if you send a lot of messages from your phone.
- Grammarly: a keyboard and app that checks grammar and suggests rewrites as you type.
- The writing tools built into your phone's operating system, which can rewrite, proofread or summarise text in many apps.
- The general assistants above, which can draft emails or posts from a short prompt.
Capturing meetings, notes and voice memos
Transcription and note apps record conversations, turn them into text and pull out summaries and action points. They save a lot of typing, but always tell people when you're recording and follow the consent rules where you live.
- Notion: notes and documents with AI features that summarise and draft from your pages.
- Otter: records and transcribes meetings and conversations, with summaries.
- The voice memo and call recording features on many phones, some of which now add transcripts and summaries.
For desk-based options with more features, see my guide to the best AI transcription software.
Photos, images and video
Image apps can remove backgrounds, fix lighting, expand a photo or create new images from a description. They're popular with small businesses that post product photos to social media.
- Adobe Express: templates and AI features for quick social graphics and short videos.
- Canva: design templates with AI tools for images, text and resizing.
- CapCut: short video editing with automatic captions and effects.
- Picsart: photo editing with AI background removal and effects.
If image editing is your main job, my guide to the best AI photo editors for business goes into more detail.
Learning, study and languages
- Duolingo: language lessons with AI features for practice conversations on some plans.
- Khan Academy's Khanmigo: an AI tutor designed to guide students rather than hand over answers.
- The general assistants, which can explain a topic at different levels or quiz you on it.
For students, the best study apps ask questions back instead of doing the work for you. That's better for learning and avoids trouble with school or university rules.
Free or paid: when upgrading makes sense
Free versions are a good test, but they often limit how much you can use the app, which models you get and whether you can upload files. Upgrade when you've hit the limits on a task you do every week, not because a pop-up told you to. One paid assistant usually covers more ground than several small paid apps, so before paying for a niche tool, check whether your main assistant already does the job.
Want AI doing the heavy lifting in your marketing?
I build the systems that handle the boring 80 percent, so you get your week back. Done properly, with the human kept in.
- Upgrade if the free limits interrupt real work more than once a week.
- Stay free if you only use the app now and then.
- Cancel trials you're not using before they renew, and set a reminder when you start one.
- Check whether your phone plan, work account or existing software already includes an AI feature you're paying for elsewhere.
Using AI apps for work on your phone
If you use AI apps for client work, keep work and personal accounts separate where you can, and follow any rules your employer or clients set. Some businesses only allow approved tools because of confidentiality, and a quick question to your manager or client saves trouble later. Never paste passwords, card numbers or private client details into a chat.
A privacy check before you install anything
| Check | Why it matters |
|---|---|
| What the app asks permission to access | Microphone, contacts and photos are sensitive; only allow what the job needs |
| Whether your chats are used to train models | Many apps let you switch this off in settings |
| Where your data is stored and for how long | Important for client details and anything confidential |
| Whether you can delete your history | You should be able to clear conversations and recordings |
| Who makes the app | Stick to known developers and avoid copycat apps with similar names |
The copycat point matters more than it sounds. App stores have plenty of lookalikes that borrow a famous name. Check the developer name before you download.
How to test an AI app in ten minutes
- Pick one real task you do every week, such as writing a client update or planning meals.
- Give the app that task with the details you'd normally use, minus anything private.
- Ask one follow-up question to see whether it keeps context.
- Check the answer for mistakes, invented facts or a tone that doesn't sound like you.
- Look at the settings for data use and switch off anything you're not happy with.
- Decide whether it saved you time. If not, delete it.
For businesses choosing apps for a team
If you're picking AI tools for staff, phone apps are only part of the picture. You'll also want to think about accounts, data rules and which tools connect to your existing software. My guide to the best AI tools for small business covers that wider decision.
Make an AI app? See how to get it featured on this list.
Frequently asked questions
What is the best AI app?
There isn't one best AI app for everyone. Choose by the job: a general assistant for questions, a transcription app for meetings, an image app for photos or a study app for learning. Then pick the option that works with your phone and accounts.
Are AI apps free?
Most have a free version with limits and a paid plan for more usage or newer features. Try the free version on a real task before paying.
Are AI apps safe to use?
Many are, if you download them from known developers and check their privacy settings. Avoid sharing confidential information, and switch off model training on your chats if the app allows it.
Which AI app is best for students?
Apps that guide you through problems rather than giving answers are best for learning. Check your school or university's rules on AI use as well.
Can AI apps work offline?
Most need an internet connection because the processing happens on remote servers. Some phones now run smaller AI features on the device itself.
How do I spot a fake AI app?
Check the developer name, the number of reviews and the permissions it asks for. Copycat apps often use a famous name with a slightly different developer.
Which AI app is best for business owners?
Most business owners get the most from one general assistant they use daily, plus one app for their biggest repeat job, such as meeting notes or social graphics. Check data settings before you use either with client information.
