Key Takeaways
- GPTs are extensions for ChatGPT — similar to browser plugins — and are now available for free-tier users, not just paid subscribers.
- For stock analysis, the recommended GPTs include Grade My Stock, Boolio, Global Invest, Stock Analyst by Daizy, and Stock Analyst GPT.
- For learning and knowledge deepening, the Multiple Choice Question Generator and Universal Primer are highlighted as particularly useful GPTs.
- God of Prompt and Prompt Professor help users craft and refine prompts, though the speaker argues that broad "AI engineering" skills matter more than narrow prompt engineering.
- For research, Consensus, Research Assistant, and Scholar AI give access to scientific publications; Afforai is recommended for academic thesis work.
- AskYourPDF lets users upload PDFs (or provide links) and ask questions about them — even in the free version of ChatGPT.
- Deepl Write can make AI-generated text more readable, but the speaker emphasises responsible use and labelling AI-generated content as such.
- Browser Pro and WebChat GPT allow ChatGPT to access current internet content, useful when browser plugins cannot be installed.
- Specialised GPTs exist for landing-page optimisation, diagram creation, SEO article writing, construction project management, and book recommendations.
- The speaker's own iPad Coach and M365 Coach GPTs are freely available and answer productivity questions about iPad and Microsoft 365.
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Introduction
Nice to have you with us again for another episode of Digital 4 Productivity. And as a regular listener of this podcast, you've probably already heard about GPTs. ChatGPT has extensions, a bit like browser plugins that you might know from Chrome. The idea is that there are extensions and in the past they could only be used in conjunction with a paid ChatGPT account. The good news is that you can now also use them in the free version of ChatGPT. You can't create your own, but you can at least use them. And they are still free of charge. At some point, ChatGPT will introduce a monetization model there, similar to the AppStore, so that the extensions that are used the most can then be given a price tag. They are currently still free of charge and here are the best GPTs from the various areas.
I have brought a few more for you from the areas of shares, learning, prompting, research and so on. Of course, you will always find the links for the topic of shares and in the show notes. So if you go to my website, Digital 4 Productivity, and then always click on the menu item Block and Podcast, you will always see the links. And of course you can also send us an e-mail to t.jekel@jekelteam.de. I'll be happy to send you the links.
Which GPTs do I recommend for stocks? Grade My Stock, Boolio with double O, Global Invest, Stock Analyst or Analyst by Daizy, not like Daisy Duck, but written with "Z" and "Y", so Daizy with "Y", and Stock Analyst GPT. So "grade my Stock, Boolio, Global Invest, Stock Analyst by Daizy and Stock Analyst GPT. So Grade my Stock, Boolio, Global Invest, Stock Analyst by Daizy and Stock Analyst GPT. These are four where you can say, for example: What are the latest key financial figures for Apple, Microsoft, Nvidia. What are the fundamental valuation criteria? To what extent would you recommend buying this stock? And here they can ask questions about shares.
Learning with GPTs
There are of course millions of GPTs on the subject of learning. Two that I find really exciting are the Multiple Choice Question Generator. This means that you can generate multiple-choice questions on any topic, to learn for yourself, for learning control, also perhaps quite interesting as a trainer, as it produces great results.
Something if you want to go deeper into topics, I usually recommend Perplexity. Perplexity is usually more for researching topics or if you're going into the research section later, which I'll get to in a moment, but Universal Primer is a great general GPT where you can just deepen your knowledge in different areas. Just give it a try.
On the subject of prompts. With God of Prompt or Prompt Professor, there are two extensions where you can ask what the characteristics of an optimal prompt are or where you can have prompts improved by the AI. In many YouTube videos or press articles or blogs, there is the statement that prompt engineering is the future job description. I think that's a bit too narrow in my view. I think AI is already good at prompt engineering. I think it's more important in the sense of AI engineering, i.e. just as you can learn leadership from employees, you can also learn leadership from AI systems. So the topic of prompting would be too narrow for me, because the topic of employee management also starts with recruiting. And if you translate that to the world of AI, it's also about: Okay, which AI systems do I choose, for example? Which ones do I use? And it goes beyond pure prompting engineering. So those of you who may also have children who are now facing their career fall, I think the topic of prompt engineer is a bit too narrow. But AI engineer in the sense of someone who deals with the meaningful use of AI is definitely a job description that is very forward-looking.
ChatGPTs for the research sector
If I go into the research area, there are three excellent GPTs, Consensus, written with a "C", Research Assistant and Scholar AI, where you can access scientific publications and new studies, for example. If you want to go even deeper, I recommend Afforai with A and then two "F "s, Afforai. Afforai is a start-up that specializes above all in people who write Bachelor's, Master's and PhD theses, i.e. scientific papers, optimizing the research process and structuring scientific sources. And if you can manage with 20 files that you upload, then that's the maximum you can do with your own GPTs, then the paid version of ChatGPT is completely sufficient. If you are working on a habilitation, PhD, PhD-MBA, then you should take a look at Afforai.
Afforai is also available relatively frequently as a deal at AppSumo. I also have a lifetime deal, I bought the smallest deal once and when it came back, I upgraded to the biggest deal because I use it quite often. But otherwise with ChatGPT, you remember I said, before you look at third-party tools, take a look at the GPTs first and even in the free version of ChatGPT you can use Consensus, Research Assistant and Scholar AI wonderfully.
Yes, then more GPTs and here are some from different areas. And I just went through my sidebar, which I use regularly, which GPTs, because you know, I don't let a non-swimmer explain to me how to swim faster. So all the recommendations that I give you here in this podcast, as well as in my talks under training advice through to one-on-one coaching for managers, are all things that I have tried out myself.
Yes, other GPTs, AI Humanizer, is a GPT with which you can rewrite AI-generated texts. This is available in an even better version with Deepl Write. You may know Deeple from your colleagues who translate.
They now also have an engine called Deepl Write, where you can write AI-generated texts even more legibly. Please do not use this tool to plagiarize in the context of scientific work. And also otherwise, if you have AI-generated texts. I think it is only right to mark AI-generated content as such, because it is naturally becoming increasingly difficult to tell the difference. For me, this is a question of responsible use. I don't think the problem is the AI itself, but the irresponsible use of it, and against this background, I think it's right to label such things.
Yes, with AskYourPDF you can upload one or more PDF files or provide links to PDFs and then ask questions about this document. The good thing is that you can already do this with the free version of ChatGPT, for example, because you can create your own GPT in the paid version. You can then upload up to 20 PDF documents. Here at AskYourPDF, you can even do this with the free version.
Then there is a construction project assistant. Why am I bringing this here? Because I also have a lot of customers from the trades. You can take minutes of construction meetings by simply entering key words. Incidentally, I can also highly recommend Talk Notes as an app for your smartphone. You can simply let it run during the construction meeting and then take minutes afterwards. Otherwise: "Construction, project assistant, very nice GPT.
Then Books. You can get book recommendations on specific topics. You can also get a "book summary". The only important thing to remember is that before you get a summary from ChatGPT, whether with or without GPT, first ask: Do you have full access to the complete book? Most of the time you will get a no. Then you know that the summary is based on other summaries. And that is of course always a worse result than having access to the complete document. Deshalb, wenn ich E-books habe, die ich gekauft habe, nutze ich Epubor Pro als Tool, die bei Kindle gekauften Bücher – muss man in der Kindle-App –, die die bei Kindle gekauft haben, die bei Kindle-gekauften Bücher, die man in der Kindle-App, die in der „Kindle-App, die in der Kindle-App, die in der Kindle-App, die in der Kindle-App, and with Epubor Ultimate I can then - and this is legal if you have bought the book yourself - remove the DRM, i.e. the Digital Rights Management, and convert this book into a PDF file, which I can then upload in my own GPT or in this AskYourPDF. Please do not do this for books that you have bought from others, or do not pass on these PDFs, but for your own books, just as if you also buy books and use them for yourself, this is also legal in digital form.
Yes, then there is a GPT with Browser Pro, with which you can also access the current Internet. With Web GPT, there is also an add-on for the Chrome browser, also for Edge. And here you can enter a link and access the internet with Browser Pro, with the WebChat GPT, which is available in the Edge browser or Chrome browser, you can also access the extended internet. Sometimes you can't install plugins, which is why Browser Pro is an add-on that you can generally also use in a corporate context.
GPT for the optimization of landing pages
Yes, if you have landing pages, then there is a great GPT with the Copywriter, Landing Page Analysis. You can enter the link to a landing page and it will tell you how you can optimize this landing page. With Data Analyst you can upload and analyze data. Of course, you should always make sure that you ideally create a provisional chat so that this data is not uploaded or, if you have the paid version of ChatGPT, you can also set it so that this data is not passed on to train your data.
Create diagrams
Yes, you can create diagrams with Diagrams. You can say, for example, "Create a diagram of iPad sales from 2010 to the present, and then you don't have to research the data, but you can get it out and then make it even more attractive in the second step, without having a Statista subscription, for example.
Yes, then Fully SEO Optimized Article. And with the Fully SEO Optimized Article, the idea is that when you write a blog post, it should ideally be search engine optimized. And this is where ChatGPT and this bot analyze SEO-optimized writing. This means that you don't write what you think is relevant, but what ranks very highly on Google. And of course an SEO agency is always more efficient, but better done than perfect.
Yes, if you are now asking yourself the question: Gee, how many GPTs? What do I need them for? What GPT is there? Then there is also a GPT directory. That means 22,500 plus best custom GPTs. So you can simply say: I'm looking for a GPT for this and that task, and then you'll get one or more recommendations. Finally, there are two more from me, the iPad Coach and the M365 Coach. This means that you can also ask any questions about how to work more productively on the iPad and how to solve problems there. The same applies to M365. So use it for that too. The nice thing is that until recently, these GPTs were only available in the paid version. Now you can also use them in the free version, including my iPad Coach or my M365 Coach.
Conclusion
If you have any further questions about M365, the iPad or AI, please do not hesitate to contact me.
I am at your disposal for keynotes, training, consulting and one-to-one coaching of executives.
With this in mind, we wish you every success.
Yours, Thorsten Jekel.
Frequently Asked Questions
What are GPTs in ChatGPT and who can use them?
GPTs are extensions for ChatGPT that work similarly to browser plugins in Chrome. They were previously limited to paid ChatGPT accounts, but they are now also available in the free version — users cannot create their own GPTs on the free plan, but they can use existing ones at no charge.
Which GPTs are best for analysing stocks and shares?
The recommended GPTs for stock analysis are Grade My Stock, Boolio, Global Invest, Stock Analyst by Daizy, and Stock Analyst GPT. These tools can provide key financial figures, fundamental valuation criteria, and buying recommendations for companies such as Apple, Microsoft, and Nvidia.
What GPTs are recommended for learning new topics?
For learning, the Multiple Choice Question Generator is recommended — it produces multiple-choice questions on any topic, useful for self-study or training purposes. Universal Primer is also highlighted as a GPT for deepening knowledge across a wide range of subjects.
Is prompt engineering really a future-proof career choice?
According to the speaker, prompt engineering alone is too narrow a focus because AI is already capable of improving its own prompts. A broader skill set — called "AI engineering" — is more forward-looking, covering decisions such as which AI systems to select and how to integrate them meaningfully, much like leadership encompasses more than just one task.
Which GPTs give access to scientific research and publications?
Consensus, Research Assistant, and Scholar AI are three GPTs that provide access to scientific publications and recent studies, all available in the free version of ChatGPT. For more intensive academic work such as Bachelor's, Master's, or PhD theses, the specialised tool Afforai is recommended.
How can I ask questions about my own PDF documents using ChatGPT?
The GPT called AskYourPDF allows users to upload one or more PDF files — or provide links to PDFs — and then ask questions about the content. This works even with the free version of ChatGPT, making it accessible without a subscription.
What is Afforai and when should I use it instead of ChatGPT?
Afforai is a start-up tool specialised in scientific research, designed for people writing Bachelor's, Master's, or PhD theses — it helps optimise the research process and structure academic sources. The speaker recommends it particularly for habilitation or PhD-MBA level work; for lighter research needs, the ChatGPT GPTs Consensus, Research Assistant, and Scholar AI are sufficient.
How can ChatGPT access live internet content?
Browser Pro is a GPT that enables access to current internet content by entering a link directly in ChatGPT. WebChat GPT, available as an add-on for the Chrome and Edge browsers, also extends ChatGPT with internet access — and Browser Pro is particularly useful in corporate environments where browser plugins cannot be installed.
What GPT can help optimise a landing page?
The Copywriter Landing Page Analysis GPT allows users to enter the URL of a landing page and receive suggestions on how to improve it. The speaker describes it as a practical way to get SEO and copywriting feedback without necessarily hiring an agency.
What are the iPad Coach and M365 Coach GPTs?
The iPad Coach and M365 Coach are GPTs created by the speaker (Thorsten Jekel) that answer questions about working productively on the iPad and using Microsoft 365 effectively. Both GPTs are now available in the free version of ChatGPT, so users no longer need a paid subscription to access them.
Tools & Resources Mentioned
- ChatGPT & AI (KI) – platform for all GPTs discussed in this episode
- Grade My Stock – GPT for stock analysis and financial key figures
- Boolio – GPT for stock evaluation and fundamental analysis
- Global Invest – GPT for global investment research
- Stock Analyst by Daizy – GPT for share analysis and buy recommendations
- Stock Analyst GPT – additional GPT for financial stock research
- Multiple Choice Question Generator – GPT for generating learning questions on any topic
- Universal Primer – GPT for deepening knowledge across many subjects
- God of Prompt – GPT for creating and improving prompts
- Prompt Professor – GPT for learning optimal prompting techniques
- Consensus – GPT for accessing scientific publications
- Research Assistant – GPT for academic and scientific research
- Scholar AI – GPT for finding and reading research studies
- Afforai – specialised research tool for academic thesis writing
- AppSumo – platform where Afforai lifetime deals have been available
- AI Humanizer – GPT for rewriting AI-generated text
- Deepl Write – tool for making AI-generated text more natural and readable
- AskYourPDF – GPT for uploading and querying PDF documents
- Talk Notes – smartphone app for recording and summarising meetings
- Books GPT – GPT for book recommendations and summaries
- Epubor Ultimate – tool for removing DRM from legally purchased e-books and converting to PDF
- Browser Pro – GPT for accessing live internet content within ChatGPT
- WebChat GPT – Chrome/Edge browser add-on extending ChatGPT with internet access
- Copywriter Landing Page Analysis – GPT for analysing and optimising landing pages
- Data Analyst – GPT for uploading and analysing data sets
- Diagrams – GPT for creating visual diagrams and charts
- Fully SEO Optimized Article – GPT for writing search-engine-optimised blog posts
- 22,500+ Best Custom GPTs – GPT directory for finding GPTs by use case
- iPad Coach GPT – speaker's own GPT for iPad productivity questions
- M365 Coach GPT – speaker's own GPT for Microsoft 365 productivity questions
- Perplexity – recommended for deep research and topic exploration outside of ChatGPT GPTs




