AI Apps for Mac You Only Pay For Once (2026 Guide)

Subscription fatigue is real. Scroll through r/macapps and you'll find thread after thread of people hunting for tools they can pay for once and simply own — "no more subscriptions" has become a rallying cry. And AI writing tools are the worst offenders: many charge $10–$30 a month, forever, for something you might use a few dozen times a day.

The good news: a small group of genuinely good one-time purchase AI apps for Mac exists. The catch: "lifetime license" is one of the slipperiest phrases in software. Lifetime of what, exactly — the app? The current major version? One year of updates? A cloud service that can be switched off?

This guide rounds up the best one-time purchase AI apps for Mac that are actually still maintained, and spells out exactly what each license includes — because a lifetime license to an abandoned app is worth nothing.

What "lifetime" actually means (read the fine print)

Before the roundup, three distinctions worth understanding:

• Lifetime updates: the best case. You pay once and receive every future version, forever. Typeahead and Fluent promise this outright; Mac App Store apps like WunderType work this way by default.
• One year of updates: increasingly common. BoltAI and TextWisely sell perpetual licenses — the app never stops working — but free updates end after 12 months unless you renew at a discount. That's fair, but it isn't "pay once, get everything forever."
• Lifetime of the product: the fine print in many terms of service defines "lifetime" as the product's lifetime, not yours. If the developer sunsets the app or its backend, your license goes with it.

And lifetime deals themselves can vanish. Elephas, a well-known Mac AI assistant, used to sell $129–$199 lifetime licenses; as of mid-2026 its pricing page is subscription-only ($19–$49/month), with lifetime deals appearing only occasionally through deal sites at much higher prices. If you were counting on grabbing that deal later, it's gone — and if you want similar features without the monthly bill, see our Elephas alternatives for Mac. The lesson: when a genuine one-time price exists, it tends not to get cheaper or more generous over time.

One-time purchase AI apps for Mac, compared

App	One-time price	What's included	Update policy	Still maintained?	Ongoing AI cost
WunderType	$8.99 (Mac App Store)	All features, 4 AI providers, unlimited custom prompts	All updates included (App Store)	Yes — v1.5.2 shipped July 2026	$0 with on-device AI or Ollama; pennies with your own API key
RewriteBar	$29 Standard / $59 Pro	Standard: 1 device + starter credits; Pro: 3 devices + 1 year of Gateway credits	Unlimited app updates	Yes — version 2 with local AI support	BYO API key or local models; optional $40/yr Gateway
TextWisely	$29	Unlimited devices, bring your own API key, Ollama support	1 year of updates, then optional renewal (keep your version forever)	Yes — active development	BYO API key or free local models
BoltAI	$79 Essential / $99 Pro	Full AI chat workspace, 300+ models, perpetual license	1 year of updates, optional renewal at 40% off	Yes — v2.13.5 shipped June 2026	BYO API keys or local models
Typeahead	$79 (early access; regular $149)	Local AI autocomplete, unlimited usage, all models included	Free updates for life	Yes — recently launched, active	$0 — fully local
Fluent	$49 Basic / $69 Standard	Smart Panel assistant; 1 Mac (Basic) or 2 Macs (Standard)	Lifetime upgrades	Yes — regular releases, active subreddit	BYO API key; NanoGPT discount included
Elephas	Discontinued	—	Moved to subscription ($19–$49/mo)	Yes, but no longer one-time	Credits included in subscription

WunderType — $8.99 once, on the Mac App Store

WunderType is the simplest license on this list because Apple handles it: one purchase on the Mac App Store, tied to your Apple ID, with every update included — no license keys, no renewal tiers, no fine print. The app itself fixes grammar and rewrites text in place: select text in any Mac app, press a shortcut, done. Five built-in modes plus unlimited custom prompts, each with its own shortcut.

Version 1.5 added on-device AI via Apple's MLX framework, joining Ollama, OpenAI (your own key, stored in Keychain), and OpenRouter. Run it on-device or through Ollama and your ongoing AI cost is exactly zero — the only app here under $10 with a truly free-forever path. It's a native Swift app using under 5 MB of memory, with no accounts, no telemetry, and no backend server. Updated days ago (v1.5.2), so maintenance isn't in question. Requires macOS 15+.

RewriteBar — $29/$59, unlimited updates

RewriteBar lives in your menu bar and rewrites selected text anywhere on your Mac. The $29 Standard license covers one device with a one-time bundle of starter credits, and — unusually generous — unlimited app updates. The $59 Pro license covers three devices and includes a year of the RewriteBar Gateway (managed credits across 58 models); after that, the Gateway is an optional $40/year, but you can ignore it entirely and bring your own API key or run local models for free.

Version 2 added PopClip integration, follow-up actions, and local AI, so it's clearly still moving. Fine print to note: the "credits" tiers nudge you toward the optional Gateway subscription — the license is one-time, the convenience layer isn't. See our full WunderType vs RewriteBar comparison and RewriteBar alternatives.

TextWisely — $29, one year of updates

TextWisely takes the JetBrains-style approach: $29 buys a perpetual license with one year of updates. When the year is up, the app keeps working forever at whatever version you're on; renewing is optional. That's an honest model — just know that "one-time" here means one year of new features, not lifetime updates.

It supports your own API keys (OpenAI, Gemini, and custom models) with requests going directly to the provider, plus offline use through Ollama. Recent releases added formatting and diff views, and there's also a $5/month subscription if you'd rather not manage keys. At version 0.2.x it's younger than the others here, which cuts both ways: rapid development now, less of a track record.

BoltAI — $79/$99, perpetual license

BoltAI is the power tool of this list — a full AI chat workspace supporting OpenAI, Anthropic, Google, Mistral, local models, and 300+ models in total, alongside inline AI commands in any app. The $79 Essential license covers one device; $99 Pro covers two desktops plus a mobile device.

The fine print matters here: your license is perpetual and the app never stops working, but free updates last one year, with an optional renewal at 40% off. Cloud sync and mobile access also pause if you don't renew. Maintenance is exemplary — version 2.13.5 shipped in June 2026 with frequent releases before it. If you want the depth without the renewal treadmill, we've rounded up BoltAI alternatives too.

Typeahead — $79, lifetime updates, fully local

Typeahead does one thing: smart autocomplete that finishes your sentences in every Mac app, powered entirely by local AI models. Because nothing leaves your Mac, there are no API keys, no cloud dependency, and no usage caps — the $79 early-access price (regular $149) includes all models, unlimited usage, and free updates for life, backed by a 30-day money-back guarantee.

It's the purest "pay once, own it" proposition here: no optional subscription layer exists even if you wanted one. The trade-off is scope — it's an autocomplete tool, not a rewriting or chat tool. If that's not quite your workflow, see our Typeahead alternatives for Mac.

Fluent — $49/$69, lifetime upgrades

Fluent is a Spotlight-style Smart Panel: summon it over any app to refine text, run AI tasks, and use MCP integrations and memory. The Basic license is $49 for one Mac; Standard is $69 for two Macs — both with lifetime upgrades, no subscription. You bring your own API key (a NanoGPT token discount is included), and the app is freemium on the Mac App Store, so you can trial it before buying.

The developer ships regular updates (the 1.4 release added MCP and memory features) and runs an active subreddit, with a zero-telemetry, privacy-focused stance. It's broader than a pure writing tool — closer to an AI assistant. For a look at more focused options, see our Fluent alternatives.

The BYO-API-key math

Most of these apps separate the license from the AI itself: you pay once for the software, then bring your own API key. People assume this is expensive. It isn't.

A typical grammar fix sends a few hundred tokens to a model like GPT-4o mini, which costs roughly $0.15 per million input tokens. Correct fifty sentences a day, every day, and you'll struggle to spend more than $0.50–$1 in a month — versus $12/month for Grammarly Pro or $20/month for ChatGPT Plus. Over a year, a $29 license plus API usage costs less than three months of a typical subscription (here's how that compares in our Grammarly alternatives guide).

And with on-device models (WunderType, Typeahead) or Ollama (WunderType, TextWisely, RewriteBar, BoltAI), the marginal cost drops to zero: the model runs on your Mac's own silicon, no key required.

Verdict: which one should you buy?

• Best overall value: WunderType — $8.99 once, App Store-managed license, and the only sub-$10 path to genuinely zero ongoing cost via on-device AI.
• Best for power users: BoltAI — unmatched model breadth, but budget for the optional yearly renewal if you want updates.
• Best truly-local pick: Typeahead — lifetime updates, no API keys, ever.
• Best menu-bar rewriter: RewriteBar — unlimited updates at $29 is a strong deal if you bring your own key.

Whatever you choose, apply the same test we used here: check the changelog, and check what "lifetime" means in the fine print. For a broader look beyond one-time licenses, our guide to the best AI writing apps for Mac covers the full field.

If you want AI writing without a subscription starting today: Download WunderType from the Mac App Store — pay once, write forever.