# Chaster App Review 2026: Features, Pricing, and Alternatives > An honest look at Chaster: the extensions system, community locks, the free tier limits, and Chaster Plus. Plus who it suits and where couples outgrow it. Source: https://getkneel.com/blog/chaster-app-review Published: 2026-08-24 Last updated: 2026-08-25 --- > **Chaster** is a web-based keyholding platform built around community locks, an extensions system, and gamified lock mechanics. It is free for one lock at a time with up to three extensions, and **Chaster Plus** is a paid tier that removes both limits. It suits solo wearers and community keyholding better than it suits couples who want a private, structured dynamic. [Visit Chaster](https://chaster.app) > We build [Kneel](/), a D/s app with a chastity module, so we have an obvious interest here. We have tried to keep this review factual and to say plainly where Chaster is the better tool. Where we compare, we compare on features you can verify yourself. ## What Is Chaster? Chaster is a keyholding platform that runs in the browser. You create a lock, set how it behaves, and either hold the key yourself, hand it to a partner, or hand it to someone from the community. What makes Chaster different from a plain timer is the **extensions system**. Extensions are add-ons that change how a lock behaves: they can add tasks, require verification, introduce randomness, or let other members add and remove time. Chaster also has a public directory of community-created lock configurations. It is a mature product with an active community. If gamified keyholding is what you want, Chaster offers substantial variety. ## Chaster Key Features - Time-based locks with customizable durations - Extensions system, add-ons from the Chaster team and the community that modify lock behavior - Community-created public locks - Keyholder support for partner-controlled locks - Kink profiles and member search - AI Keyholder, a Plus-exclusive extension, currently in alpha and limited to testers **Platform**: web-based. There is no native mobile app, but the site installs as a PWA on a phone, which gets you an icon on your home screen and a near-app experience. ## Chaster Pricing: What Free Gets You, and What Plus Adds Chaster has a functional free tier. It is limited in two specific ways: - **One lock at a time** - **Three extensions** per lock **Chaster Plus** is a monthly subscription that removes both limits. It also adds: - Preview access to new extensions - Exclusive extensions, including the AI Keyholder (in alpha, testers only) - Image verification for combination photos - Private keyholder notes Chaster Plus is listed at **€9.99 per month** on its [public Plus page](https://chaster.app/plus). The [official Plus documentation](https://docs.chaster.app/chaster-plus/) lists unlimited locks and extensions, exclusive extensions, image verification, templates, and private keyholder notes. The free tier is worth taking seriously. One lock at a time is exactly what most people run anyway, and three extensions is enough to build something interesting. ## Where Chaster Is Strong **The community.** Chaster lets users browse public locks and find keyholders without knowing them first. If you want a keyholder and do not have a partner who wants that role, Chaster addresses a need that a private couples app does not. **The extensions system.** Variety and gamification that nothing else in this category matches. If the appeal of chastity for you is the game, Chaster is built for you. **It works for solo and partnered use.** Plenty of tools assume one or the other. Chaster handles both. **The free tier is usable.** Not a trial, not a demo. You can run real sessions on it. ## Where Couples Outgrow Chaster To be clear about the frame: these are not bugs. Chaster is built for community keyholding, and it does that well. They matter only if you want a private dynamic with one partner. **It is community-focused by design.** Kink profiles, member search, and community-controlled locks are features, not accidents. If you and your partner want your dynamic to stay between the two of you, much of the product is built for something you are not doing. **Web-only.** The PWA works and does support push notifications, though on iOS you only get them if you install it to your home screen first. There is no App Store or Play Store app, which shows up in offline behavior and the general feel of something you check several times a day. **Extensions add complexity.** The same system that gives Chaster its variety makes lock mechanics hard to reason about when you are new. **Chastity is the whole product.** If your dynamic includes tasks, rituals, contracts, or check-ins that are not about a lock, they live somewhere else. ## Chaster vs Kneel The short version: **Chaster is a keyholding platform. Kneel is a D/s app that includes chastity.** If chastity is your dynamic, Chaster is likely the better fit, and the community is a real reason to pick it. If chastity is one part of a dynamic that also involves [tasks](/blog/dom-sub-app), [rituals](/blog/guide-to-daily-rituals), [contracts](/blog/flr-contract), and daily check-ins, a single app that holds all of it will serve you better than a keyholding site plus three other tools. | | Chaster | Kneel | | --- | --- | --- | | Built for | Community and solo keyholding | Couples in a D/s dynamic | | Platform | Web, PWA | Native iOS and Android | | Chastity | The whole product | One module of several | | Community | Large, central to the product | None, private by design | | Extensions / gamification | Extensive | No | | Tasks, rituals, contracts | Tasks via extensions only | Yes | | Check-ins | Lock logs and timers | Structured, with difficulty rating and notes | | Free tier | One lock, three extensions | Yes, chastity requires Premium | | Paid | Chaster Plus, €9.99/month, one subscriber covers the lock | $9.99/month or $79.99/year, covers both partners | Both apps let one person pay for two people, so that is not a differentiator. Chaster's docs are explicit that only one side of a lock needs Plus for its benefits to apply, and Kneel's subscription covers both partners. The difference is what the money buys, not who has to buy it. ## Who Should Use Chaster Use Chaster if you want any of these: - A keyholder from the community rather than a partner - Gamified locks, randomness, and challenge variety - Solo chastity with structure - A free tool that does real work without paying ## Who Should Look Elsewhere Look at [other chastity apps](/blog/chastity-app) if: - You want your dynamic private, with no community layer - You want a native mobile app with proper notifications - Chastity is one part of a broader dynamic, not the whole of it - You want structured check-ins rather than lock logs ## Frequently Asked Questions ### What is the Chaster app? Chaster is a web-based keyholding platform for chastity. You create locks, configure them with extensions, and hold the key yourself or give it to a partner or community keyholder. It installs as a PWA on phones but has no native mobile app. ### Is Chaster free? Yes, with limits. The free tier allows one lock at a time and up to three extensions. Chaster Plus is a paid monthly tier at €9.99/month that removes both limits and adds exclusive extensions, image verification, and private keyholder notes. ### Does Chaster have an AI keyholder? Partly. The AI Keyholder is exclusive to Chaster Plus, but Chaster's own docs list it as "in alpha, limited to testers", so paying for Plus does not guarantee access to it. Other apps take different approaches: [Chastify](/blog/chastity-app) includes AI keyholders with customizable personas, and [ChastiSafe](/blog/chastisafe-review) uses scripted bot keyholders rather than conversational AI. ### Does Chaster have a mobile app? No native app. Chaster is web-based and installs as a PWA, which puts an icon on your home screen and behaves close to an app. If a native app matters to you, that is a real difference. ### What are the best Chaster alternatives? It depends what you want instead. For free bot keyholding, [ChastiSafe](/blog/chastisafe-review). For smart device support, Chastify. For couples who want chastity inside a wider D/s dynamic, Kneel. We compare all of them in our [chastity app guide](/blog/chastity-app). ### Can my partner hold the key on Chaster? Yes. Chaster supports keyholder-controlled locks, so a partner can hold the key remotely without being physically present. This works for [long-distance dynamics](/blog/power-exchange-for-couples) as well as same-household ones. - Chaster is a web-based keyholding platform whose real product is its community and extensions system. - The free tier is usable: one lock at a time and up to three extensions. - Chaster Plus is €9.99/month and removes both limits; the AI Keyholder extension is Plus-exclusive but still in alpha and limited to testers. - It fits solo and community keyholding better than it fits couples who want a private, structured dynamic. - If chastity is one part of a wider D/s dynamic, an app that also holds tasks, rituals, and contracts will serve you better. > Details change. We last checked this in August 2026. If something here is out of date, tell us and we will correct it.