Bob is an established macOS translation and OCR app. Its official site lists selection, screenshot, and input translation, several OCR modes, 30 or more translation services, and plugins.
TranslateWindow opens selection, screenshot, clipboard, input, and live-window translation from one command panel. It supports local models, built-in Google and DeepSeek, your own API keys, URL Scheme calls, PopClip, translation scenes, and text polishing.
This comparison uses Bob's official website and repository, checked on August 16, 2026.
At a glance
| Area | TranslateWindow | Bob |
|---|---|---|
| Platform | macOS 15+; Windows announced | macOS |
| Starting a translation | Selection, clipboard, screenshot, input, and live-window translation in one command panel | Separate selection, screenshot, input, and OCR actions |
| Selection translation | Compact result beside the source | Officially supported |
| Screenshot translation | Translated image can retain layout and be copied or saved | Screenshot translation plus several OCR actions |
| Changing screen region | Pinned live-window mode for visible text | The official translation list covers selection, screenshot, and input |
| Result presentation | One result first, more models on demand | Multiple translation services can run together |
| Context and polishing | Scenes store terms, tone, and polishing rules | Plugins and service configuration extend the workflow |
| Model choice | Local models, built-in services, and your own API keys | 30+ services listed on the official site |
Open a translation from the command panel
Press Command+J and choose how to translate the content in front of you. For selected text, you can also press Command+E directly.
Service credentials, model parameters, and advanced options have their own settings screens. They remain available without filling the translation window with controls.
One result first, comparison when it helps
TranslateWindow opens a single result beside the source. When wording matters, expand the same window to compare other models. A quick lookup stays small, while a difficult sentence can still use several opinions.
Bob can run several translation services together. That is useful when simultaneous results are your default. TranslateWindow makes comparison an intentional second step.
Screenshot and live translation cover different screen tasks
For one static image, TranslateWindow can translate the screenshot, keep recognized text near its original position, and let you copy or save the translated image.
For subtitles, game text, remote desktops, or app panels that keep changing, pin a live region. TranslateWindow reads visible text from that region and refreshes the result without asking for another screenshot. It does not create captions from speech.
Scenes remember how you want the result to read
A sentence for a support chat should not sound like a research note. Scenes save the terms, tone, and polishing rules you reuse for each kind of work.
Choose the scene before translating, or polish the result in the same window. You do not need to rewrite the same instruction for every message.
Choose by the work you repeat
- Keep Bob if its shortcuts, OCR tools, plugins, and service setup already match your habits.
- Try TranslateWindow if you want to open translations from one command panel and start with a single result.
- Use TranslateWindow when a changing visual region, reusable scene, local model, or translated-image export is part of the task.
- Compare the result style: several services at once in Bob, or one focused answer with comparison on demand in TranslateWindow.
Questions before switching from Bob
Does TranslateWindow support workflows? Yes. It supports URL Scheme calls and PopClip, alongside its own command panel and translation scenes.
Can it compare several models? Yes. The first result stays compact, and you can open more models in the same result window.
Does local mean every mode is offline? The translation step can stay on the Mac when you choose a downloaded local model. Cloud services still send the required text to the provider you select.
Try a quieter Bob alternative
Use TranslateWindow on the same webpage, screenshot, and changing screen region. See which interface gets out of the way sooner.
Sources and verification
Product facts were checked against these first-party sources. Links open the current official documentation.