DeepL is known as the world's most accurate machine translation service. Its translation engine is developed based on neural network artificial intelligence, and according to its disclosed professional translator blind test results, DeepL outperforms its competitors by a factor of 3: 1, and in the blind test of translation quality in English ⇄ Chinese, it is even 5 times higher than other machine translation engines.
DeepL被誉为世界上最准确的机器翻译服务。其翻译引擎基于神经网络人工智能开发，根据其公开的专业译员盲测结果，DeepL的表现比竞争对手高出3：1倍，在英文⇄中文翻译质量盲测中，甚至比其他机器翻译引擎高出5倍。

The GPT model by OpenAI is trained on a large amount of textual data, which means it performs exceptionally well when dealing with various professional terms. It excels in understanding the context of sentences or paragraphs, and after extensive comparisons, the conclusion is that OpenAI's translation quality is currently among the best in most cases. However, due to OpenAI's core mechanism of sequentially predicting each word in a sentence, its translation speed is relatively slow. Additionally, since OpenAI is not specifically created as a translation service, it has some security limitations, such as refusing to translate paragraphs with certain negative meanings. Lastly, as it is still in its early stages, the service may sometimes be relatively less stable.
OpenAI 的 GPT 模型是在大量文本数据上训练的，这意味着它在处理各种专业术语时表现得非常出色。它在理解句子或段落的上下文方面表现出色，经过广泛的比较，得出的结论是 OpenAI 的翻译质量目前在大多数情况下都是最好的。然而，由于OpenAI的核心机制是按顺序预测句子中的每个单词，因此其翻译速度相对较慢。此外，由于 OpenAI 不是专门作为翻译服务创建的，因此它有一些安全限制，例如拒绝翻译具有某些负面含义的段落。最后，由于它仍处于早期阶段，因此服务有时可能相对不太稳定。

Yes, you can use Immersive Translate completely free of charge, as Immersive Translate offers the most comprehensive free package of its kind, with no restrictions on the use of any features. And for those who wish to use DeepL and OpenAI Translator, Immersive Translate offers a low-cost and out-of-the-box experience.
是的，您可以完全免费使用 Immersive Translate，因为 Immersive Translate 提供同类产品中最全面的免费套餐，对任何功能的使用都没有限制。对于那些希望使用DeepL和OpenAI Translator的人来说，沉浸式翻译提供了低成本和开箱即用的体验。

For a quick start, the following should suffice (we also have a more detailed guide here)：

1. After installation, the browser will collapse the Immersive Translate extension icon by default, so as a first step, you need to put Immersive Translate in the collapse menu in the top right corner ofbrowseras follows：
   
2. Next, you can translate the web page, take USA Today as an example, open USA Today's English web page, right click in any area, and select [Translate webpage/Display original text] button in the menu, the web page will be displayed in bilingual form. If you like shortcuts, you can press [Alt+A] (Option+A for MacOS) to trigger the webpage translation. Another way is to click the Immersive Translate icon in your browser toolbar and then click [Translate] as follows：
   
3. If you want to translate documents, such as PDF, Epub, subtitle files, etc., you can click the [Immersive Translate] icon in the browser toolbar and click [More].

Yes, we have an easy-to-join affiliate program. Anyone can click here to apply on their own, after which you will receive a unique referral link. Using this link, you can recommend immersive translation to your friends. If your friend upgrades to an immersive translation Pro member within 30 days, you will receive a 20% referral commission. Additionally, friends who purchase through your link will also enjoy a 5% first year/first month discount.

Yes, we did find that there is more and higher-quality foreign language content on the internet. That's why we developed Immersive Translate. We have also compiled a list of high-quality English websites that you can explore for content that interests you. Additionally, you can follow individuals or topics of interest on popular foreign social media platforms for real-time information, such as Twitter, Reddit, Youtube, and so on.

The translation character count for both DeepL and OpenAI is not unlimited; they each have their respective limits. However, in the majority of cases, you shouldn't worry about usage limits, as the total translation quota for monthly/annual Pro members is designed to accommodate the high-frequency translation needs of web users. If you have additional requirements beyond the limits, you can purchase exclusive additional traffic packages for DeepL or OpenAI after reaching the limit. All users should adhere to our fair usage policy, meaning you should only use the translation services provided by Immersive Translate within Immersive Translate. It is not allowed for any user to access the translation services provided by Immersive Translate through automated programs.

Not the same, the quota of DeepL is about 3 times that of OpenAI. For web page translation, DeepL translations combine the advantages of quality and speed, and we recommend using DeepL for main translations and OpenAI when needed.

Yes, each account can use up to 8 devices simultaneously. If you exceed this limit, the device that was logged in first will be automatically logged out. Please note that here "devices" refer to browsers.

No, only GPT3.5 is currently supported.

Yes, we have partnered with Stripe to support a monthly debit service using paypal.

Yes, we have partnered with Stripe to support credit cards issued by any of the major credit card organizations including UnionPay, this includes UnionPay, Visa, MasterCard and more.

Yes, you can try it out for free, just subscribe to the 1-day free trial package by selecting it directly above. You can cancel at any time before the trial expires without any charge.

Because Pro Membership provides a virtual service, refunds are not supported. We recommend that you first try the free trial packages we offer to get a feel for our services.

You can click on [Billing] on your profile page, then, on the billing page, click on [Cancel Plan] to unsubscribe.

Due to Apple's restrictions on virtual services, it is currently not possible to directly purchase Immersive Translate membership in Safari. However, you can subscribe to the membership on other platforms, such as Chrome, Edge browsers, etc. Once subscribed, you can log in to your account on Safari to access the membership services.

There is indeed a significant difference in the volume of requests between web page translation and word selection translation. To address this, we innovatively adopted the technique of pre-caching popular public web pages. Simultaneously, we combined it with our optimized web page segment matching technology to ensure that costs are kept within a controllable range. Additionally, we expect that as our scale expands, we can gain more bargaining power.

If you have any other questions, please contact our customer support at support@immersivetranslate.com or pull down to the bottom of the page to join one of our user groups, such as WeChat, QQ, Telegram, etc.