5 AI Writing Apps That Actually Made Me Write More

AI writing tools are everywhere now. Half of them are just ChatGPT with a different coat of paint. The other half promise to “10x your productivity” and deliver gibberish that sounds like a LinkedIn post written by a robot pretending to be human.

I spent a few weeks actually using these things. Not just clicking around — actually writing real stuff with them. Articles, emails, notes, fiction. Here's what I found. Five apps worth your time. Ranked honestly.

Notion AI — Best for People Who Already Live in Notion

Notion AI wins on context. Every other writing tool starts from a blank slate. Notion AI knows your docs, your meeting notes, your project briefs. You can ask it to summarize last week's notes or draft a follow-up based on the doc you're literally looking at. That's genuinely different.

The writing quality is solid. Not spectacular, but consistent. It handles tone shifts well — tell it to make something more casual and it actually does it without mangling the meaning. The summarization feature alone saves me probably 20 minutes a week on meeting notes.

The downside is the lock-in. If you don't use Notion, there's no reason to start just for the AI. And if you're a heavy writer who needs a distraction-free environment, Notion's busy interface works against you. The AI add-on is also priced on top of your existing Notion plan, which adds up fast for teams.

Who it's for: Teams and solo operators who run their whole workflow in Notion. If your notes are already there, the AI is a no-brainer add-on.

Grammarly — Best for Editing What You Already Wrote

Grammarly has been doing this longer than anyone. The difference now is it doesn't just fix your grammar — it rewrites whole sentences and paragraphs when you ask. The generative AI features landed quietly but they're genuinely good.

What sets Grammarly apart is tone detection. It reads your writing and understands how you sound. Then when it suggests changes, it tries to keep your voice. I write in a pretty casual style. Most AI tools iron that out. Grammarly mostly leaves it alone and fixes the actual problems. That matters.

The free tier is surprisingly useful for basic grammar and spelling. Pro unlocks the AI rewriting and tone tools. The browser extension is still the killer feature — it works everywhere: Gmail, Google Docs, LinkedIn, anywhere you type in a browser. The downside is it can be aggressive about flagging things that aren't wrong. Especially with intentional stylistic choices. Fragments on purpose. It hates those.

“Grammarly is the only AI writing tool I'd recommend to someone who just wants their emails to not sound careless. It requires no setup, no learning curve, and works everywhere.”

One real limitation: Grammarly is not for drafting from scratch. It's a polish layer. If you need to generate content, it'll do it, but the outputs feel thin compared to tools built for generation. Use it after you've written something, not instead of writing.

Who it's for: Anyone who writes emails, reports, or docs professionally and wants a safety net. Non-native English speakers especially. Also good for people who write their own content but want a second pass before sending.

Jasper — Best for Marketing Copy at Scale

Jasper is for teams that need to publish a lot. Regularly. With consistent brand voice. That's a specific problem, and Jasper solves it better than anything else on this list.

The brand voice feature is where it earns its price. You feed it examples of your writing and it learns your style. Then every output sounds like you, not like a generic AI. I tested it with a few writing samples — the difference between Jasper with brand voice and without is significant. Without it, you get competent but forgettable copy. With it, you get something that actually sounds like a person wrote it.

The price is the honest sticking point. $39 a month at minimum. That's steep for a solo blogger. For a marketing team publishing daily? It probably pays for itself. The template library is also genuinely useful — they have flows for Facebook ads, landing pages, product descriptions, email sequences. Not just generic “write me a blog post.”

Who it's for: Marketing teams, content agencies, e-commerce brands that produce large volumes of copy. Solo creators will likely find the price hard to justify.

Sudowrite — Best for Fiction and Creative Writing

This is the one indie app on the list. Sudowrite was built by novelists who were actually using AI to write, and it shows. Every feature is designed around the specific ways fiction writers get stuck. Not the ways marketing teams get stuck.

The “Describe” feature is genuinely something I've never seen elsewhere. You highlight a scene and ask it to describe it through a specific sense — sound, smell, texture. It gives you five options. All of them are usable. Some of them are good. As a developer, I spend zero time thinking about sensory prose. This tool fills that gap without making me feel like a fraud.

The story engine is the flagship feature for longer work. You give it your characters, setting, and plot beats, and it helps you write chapter by chapter. It doesn't write the book for you. It helps you write the book. The framing matters. Writers who use it that way seem to finish more work.

“The difference between Sudowrite and using ChatGPT for fiction is like the difference between a specialist and a generalist. ChatGPT will write your scene. Sudowrite will help you write your scene.”

The honest downside: Sudowrite is not the best at pure prose quality when given free rein. It sometimes goes purple and overwrought. You'll rewrite what it gives you. That's fine — that's the workflow. But if you want outputs you can paste directly without editing, look elsewhere. Also, $10/month gets you limited words per month. Serious writers will hit the ceiling fast and move to the $25/month plan.

Who it's for: Fiction writers, screenwriters, anyone working on long-form creative projects. Completely wrong tool for business writing.

iA Writer — Best for Writers Who Don't Want AI to Write for Them

iA Writer is the contrarian pick. It doesn't generate content. It doesn't autocomplete your sentences. The AI feature, called Style Check, does one thing: it finds weak writing and shows it to you so you can fix it.

As a developer, I respect this design decision. They could have added a “rewrite this for me” button. They chose not to. Style Check flags things like filler words, passive voice, weasel words, and redundant phrases. It doesn't fix them. It highlights them and waits. You decide what to do. Your voice stays yours.

The focused writing environment has been best-in-class for years. No sidebars. No dashboards. No notifications. Just you and your text. The typography is obsessively good. Writing in iA Writer feels different from writing anywhere else, in a way that's hard to explain until you try it. It gets your brain into a different mode.

Who it's for: Journalists, bloggers, essayists, anyone who cares about their own voice and wants AI as a training tool rather than a ghostwriter. Great for developers who write technical docs and want them to not sound robotic.

Quick Comparison

Who Should Get What

If you're already in Notion all day: get Notion AI. It's the easiest win on this list. If you write emails for work and just want fewer embarrassing typos: use Grammarly's free tier. It's good enough.

If you run a content team and publish more than twice a week: Jasper is worth the price. Set up brand voice once, and your whole team writes on-brand without a style guide meeting. If you write fiction and keep hitting walls: Sudowrite is the only tool that actually understands your problem. The features are designed around the specific pain of being a fiction writer, not a marketing director.

If you want to become a clearer writer rather than a faster one: iA Writer. The one-time price looks steep but it pays off faster than any monthly subscription. It's also the only app here I'd call genuinely good software design.

FAQ

Can I use these apps without any writing experience?

Yes. Grammarly and Notion AI especially. They're designed for everyday users, not professional writers. Grammarly works in the background without you having to think about it. Jasper and Sudowrite have steeper learning curves, but they're still accessible if you follow the setup guides.

Will Google penalize content written with AI tools?

Google's stated policy is about content quality, not origin. AI-generated content that's thin, repetitive, or obviously templated gets penalized. AI-assisted content that's original, useful, and specific doesn't. The apps on this list are tools. What you do with them matters more than the fact that you used them.

Which one has the best free plan?

Grammarly, by a lot. The free tier handles grammar, spelling, and basic clarity suggestions across every website you use. That's a genuinely useful product at $0. Notion AI requires a paid Notion plan to get meaningful use. iA Writer has a free trial but no free tier.

Are these apps available on iPhone and Android?

Grammarly has iOS and Android keyboard apps. Notion AI is on iOS and Android through the main Notion app. iA Writer is on iPhone and iPad (Mac version is separate). Jasper and Sudowrite are primarily web-based — they work in mobile browsers but aren't optimized for phone screens.