Hammer AI (written HammerAI by the developer) is an adults-only AI character chat, roleplay and story-writing platform. It works on the web, on desktop (Windows, Mac, Linux) and on iPhone. Chatting with local models is free. The free cloud tier is capped at 600 messages a day, and paid plans run from $9 to $35 a month. Privacy depends on how you use it. Chats run through a local model on the desktop app stay on your device. Chats sent to cloud models pass through outside AI providers.
What Hammer AI is
HammerAI is a creative tool, not a general assistant. You browse community-made characters or build your own, then chat one-on-one or in group chats of up to ten characters. It also has lorebooks (saved world facts the AI draws on), personas (who you are in the story), a story writer, cloud image generation and text-to-speech. The pricing page describes the project as built by one developer, with revenue going to server costs and hired help.
It is not a coding or productivity tool. HammerAI’s own terms say all AI output is for entertainment only and should not be relied on for facts, medical, legal or professional advice.
Local vs cloud: the difference that matters
HammerAI runs in two ways. Its FAQ explains that the web app uses cloud models on its servers, while the desktop app can also download and run models on your own computer.
| Desktop with local model | Web or mobile with cloud model | |
|---|---|---|
| Where text is generated | Your computer | Third-party AI providers, routed by HammerAI |
| Internet needed | No | Yes |
| Cost | Free | Free tier capped; paid tiers raise limits |
| Speed and quality | Depends on your hardware and the model | Depends on the model offered |
On desktop, HammerAI says it is powered by Ollama and Llama.cpp. Ollama sets up Nvidia, AMD, Intel or Apple GPU acceleration automatically, and the app supports 20+ models without configuration. You can also bring your own Ollama Modelfile. Downloads are listed for Apple Silicon Macs, Windows, and Linux (Debian, Flatpak and RPM).
How to set up fully local chat
- Download the desktop app from hammerai.com/desktop. No login is needed.
- Pick a model in the app and let it download. Smaller models suit weaker computers.
- Choose or create a character and confirm a local model is selected, not a cloud one.
- To check that it is truly offline, disconnect from the internet and see whether the chat still works. HammerAI suggests this test itself.
Hammer AI pricing in 2026
The figures below come from the official pricing page, checked on October 13, 2026.
| Plan | Price | Cloud messages | Max context | Monthly credits |
|---|---|---|---|---|
| Free | $0 | 600 per day | 8,192 tokens | None |
| Starter | $9/month | Unlimited | 16,384 tokens | 1,500 |
| Advanced | $18/month | Unlimited | 32,768 tokens | 3,500 |
| Ultimate | $35/month | Unlimited | 65,536 tokens | 9,000 |
Credits pay for cloud images (10 each) and text-to-speech (5 each). Monthly credits expire at the end of each billing period. Separate one-time credit packs, from $1.99 for 200 credits to $99.99 for 20,000, do not expire. Local models, Proxy to any LLM API, group chats and lorebooks are listed on every plan, including Free.
Three details are easy to miss:
- The pricing page contradicts itself in places. The plan cards and comparison table give different counts of cloud models for Advanced and Ultimate. An FAQ answer lists higher credit allowances than the cards. This article uses only the figures that agree across the page.
- Purchases are final. The page says its payment processor does not support refunds.
- App Store prices are slightly lower. The iPhone listing shows Starter at $8.99 monthly, Advanced at $17.99 and Ultimate at $34.99, plus weekly options.
Hammer AI privacy: what the documents actually say
Two official statements pull in different directions, and no top-ranking page points this out.
The FAQ says that on cloud models your messages are sent to HammerAI’s servers but are not stored or used for training. The privacy policy (last updated March 29, 2026) adds detail. Messages go to third-party AI providers, such as those reached through OpenRouter. Those providers may keep them and may use them for their own purposes, including training. HammerAI says it does not train models on user data itself, and that it does not collect information about your conversations.
Ads add another layer. The policy says free-tier users see ads from Adsterra and Elo. To pick relevant ads, the browser sends a limited amount of recent chat content to Elo’s ad server. Paid plans remove the ads and stop that sharing. The pricing page says the desktop app has no ads.
So the safest setup is the desktop app with a local model. Sensitive writing in the free web app is the riskiest one. The mobile app says chats and characters are stored on your device by default, and the policy says the mobile apps do not use Google Analytics. But if a mobile chat uses a cloud model, that chat still goes to providers.
Who can use it, and what is allowed
HammerAI’s terms and compliance page set the minimum age at 18, or the local age of consent if higher. The App Store listing also shows an 18+ rating.
The site’s marketing talks about “no filters”. Its compliance page says content involving minors, self-harm encouragement, graphic violence, illegal activity, harassment and hate speech is filtered and blocked. It also bans deepfakes of real people made without their consent. Treat HammerAI as relaxed, not rule-free. Breaking the rules can mean removal, account termination, or a report to law enforcement.
HammerAI is not therapy. Its terms say so and list 988 (call or text) for people in crisis in the US.
Is the Android app real? How to avoid lookalikes
Official sources conflict here. HammerAI’s mobile page links a Google Play listing with the package ID com.hammerai.app. Its FAQ and desktop page say the Android app is temporarily unavailable.
The Google Play page ranking in search is a different listing: package ai.hammer, published by WhatsGoodApps LLC. It had a 1.8 rating from 33 reviews, and its last update was November 19, 2025. One reviewer calls it a copy of the HammerAI website. HammerAI’s own pages never name that developer, so it cannot be tied to HammerAI. An iPhone lookalike titled “HammerAi by WGA” also appears alongside the official listing, which is published by HammerAI (seller Sunspot LLC) and rated 3.2 from 17 ratings.
Reach the apps from hammerai.com/mobile, not from a search result. Avoid APK files from third-party sites.
Practical Insights
- Match the version to the task. Use desktop with a local model for private fiction, and the web or mobile app for quick, low-stakes chats.
- Check the limits before paying. The free tier’s 8,192-token context window explains why characters “forget” things. The FAQ says characters can consider only a limited amount of the conversation, so details you haven’t mentioned lately drop out. Lorebooks exist to hold that world information.
- Read the credit math. One Starter month (1,500 credits) covers 150 cloud images or 300 voice clips, not both.
- Weigh the price against local use. If your computer can run a local model, the free desktop path covers chat. Paid plans mainly add cloud models, images and voices.
- Treat reviews as dated. Some third-party reviews say HammerAI has no official download, no privacy policy and no age rules. HammerAI’s own site documents all three. Check the official pages for the current picture, and treat the older reviews with the same caution.
Common mistakes
- Assuming “private” means everything stays offline. Local chat does. Cloud chat, cloud images and voices do not.
- Entering real names, workplaces or contact details into any chat.
- Installing a lookalike app from a search result or an APK site.
- Buying a plan before checking the refund terms.
- Using it as a source of advice. HammerAI’s own terms say not to.
For related reading on this site, see a writer’s review of DreamGen AI, the FictionLab AI guide and the Ourdream AI guide. For privacy, there is a case study on a breach at another AI companion platform and an overview of AI’s role in mobile app security and data protection.
FAQs
Is Hammer AI free?
Chatting with local models on the desktop app is free. The free cloud tier allows 600 messages a day. Cloud images, voices and larger context windows need a paid plan or credit pack.
Is Hammer AI safe and private?
Local desktop chat stays on your device. Cloud chat is sent to third-party AI providers, who may retain it under their own policies. Free-tier ads also use a limited amount of recent chat content.
Does Hammer AI work offline?
Yes, on the desktop app with a downloaded local model. Cloud models, cloud images and cloud voices need an internet connection.
What devices does it support?
The web app runs in major browsers. Desktop covers Windows, Mac (Apple Silicon) and Linux, and there is an iPhone and iPad app. The Android app is listed as temporarily unavailable on some official pages.
Do I need an account?
No. An account is optional for local chat. You need one for cloud models, syncing and purchases.
Is it legal and allowed for teens?
HammerAI is for adults only. Its terms require users to be 18 or the local age of consent, whichever is greater.
Does HammerAI train AI on my chats?
HammerAI says it does not. Its privacy policy warns that third-party providers it routes cloud chats to may use messages for their own purposes.
Can I get a refund?
The pricing page says purchases are final and refunds are not supported. Subscriptions bought in the iPhone app are managed through your device’s subscription settings.
Conclusion
Hammer AI is a flexible tool for roleplay and fiction, with a rare free local option. Its privacy depends on the mode you choose. For anything personal, use the desktop app with a local model, keep real identifying details out of chats, and download only through hammerai.com. Check the pricing page again before you pay, since its figures have inconsistencies and plans can change.
Disclaimer
This article is general information about a software product and is not an endorsement. Prices, features, platform availability and policies can change, so confirm them with HammerAI and the official app stores before you subscribe or share personal data. HammerAI is for adults only and is not a substitute for professional support. Information current as of October 2026.
