Ask Pastest and Tutor Mode are not simply two names for the same task. In Pastest's published descriptions checked on 6 September 2026, Ask Pastest supports standalone questions, while Tutor Mode offers help during question practice. The useful distinction is where the learning conversation starts and whether it remains connected to the answer you attempted.
The published distinction
The MRCP Part 1 product page, checked on 6 September 2026, describes Tutor Mode as AI support while answering questions. Ask Pastest is described separately, with answers drawing on Pastest content and NICE. The broader written-exam practice page describes contextual explanations and support within revision.
Those statements establish the intended product roles. They do not establish that every generated claim has a clickable citation, that either tool always withholds the correct answer, or that an explanation improves later examination performance. Those questions require direct inspection or appropriate outcome research.
This comparison is published by iatroX and includes its Socratic Tutor. It is based on the documented designs, not a controlled test of the platforms' answers.
Standalone questions are useful when you can name the problem
Ask-style tools are convenient when you already know what you need to understand. A learner might ask for a comparison between two physiological mechanisms, an explanation of a term in a textbook, or a way to organise a difficult topic.
The weakness of that starting point is not the tool itself. It is that learners do not always know which assumption caused their error. A broad request to explain a topic can produce a helpful overview while leaving the original misconception untouched.
Make the request narrower. Instead of asking for everything about a topic, describe your own reasoning in ordinary language and identify the point that seems inconsistent. Do not paste material you are not authorised to reproduce. Often a short description of the conceptual difficulty is enough.
Then ask a question that requires an answer from you. A conversational interface becomes a better learning environment when you use it to expose your reasoning, rather than only request polished explanations.
In-question help has a different advantage
When assistance sits beside the question, the learner has an immediate reference point: the stem, their selected option and the uncertainty that arose while answering. That can reduce the work of rebuilding context.
There are still two different uses of help. One is rescue before committing to an answer. The other is review after an independent attempt. The first can help when a learner is genuinely stuck; the second preserves a clearer record of what they could do unaided.
Decide which mode of learning you want before starting a session. If the purpose is to investigate misconceptions, an honest wrong answer can be informative. If the purpose is timed assessment practice, interrupting every difficult item with assistance changes what the resulting percentage means.
Do not compare an assisted practice score with an unassisted mock score as though both measured the same thing. The assistance is part of the learning condition and should be recorded as such.
A worked example of the difference
Consider a fictional learner who answers a mechanism question incorrectly because they confuse the cause of a physiological change with the body's response to it. A standalone explanation might describe the entire feedback system correctly. The learner may agree with every sentence and still fail to notice their original reversal.
A more diagnostic exchange asks the learner to identify the first change, then predict the response and explain why it follows. If the learner reverses the sequence again, the tutor has found a specific point to address.
The example is an editorial teaching scenario, not an observed Pastest or iatroX conversation. It shows what to look for when trying the products: does the exchange uncover the incorrect relationship, or does it merely make the topic sound familiar?
After the explanation, change one feature of the scenario. Ask the learner to predict what follows without hints. That changed question is more informative than asking whether the explanation made sense.
Sources and tutoring behaviour are separate checks
A tool can cite a good source yet teach poorly. It can also conduct an engaging conversation while making an unsupported claim. Evaluate the evidence and the teaching behaviour separately.
For the evidence check, open the relevant source and see whether it supports the specific statement. For the educational check, identify what the learner had to do: retrieve a fact, explain a relationship, discriminate between alternatives or apply the idea in a changed situation.
The useful question is not whether the response feels intelligent. It is whether the learner leaves with a clearer, testable understanding and knows which material supports it.
Where iatroX's Socratic approach fits
Under iatroX's September 2026 product information, the Socratic Tutor opens on an attempted question, asks targeted follow-ups and seeks to identify the learner's misconception rather than simply provide the answer. That is a design description, not a guarantee that every interaction will diagnose the problem correctly.
It is particularly relevant for a learner who repeatedly understands explanations after reading them but struggles to produce the reasoning independently. The attempted question supplies the starting point; a useful session ends with something the learner can explain or apply without the tutor.
iatroX's September 2026 learning subscription is £99 annually upfront, equivalent to £8.25 monthly billed annually, or £29 monthly. Tutor, study planning, simulations and CPD sit within the same subscription as paid question-bank access. The case for paying is the connected learning workflow, not a claim that standalone explanations are inherently inferior.
Which should you use?
Use standalone question support when you can articulate a focused uncertainty outside a bank session. Use in-question help when the difficulty is tied to a particular item and you want to preserve that context. Compare Socratic tutoring when your recurring problem is reasoning through an answer independently.
A learner who already benefits from Pastest's explanations may not need another subscription. A learner who wants more active questioning should test that behaviour directly rather than choosing from the word tutor alone.
Frequently asked questions
Is Ask Pastest the same as Tutor Mode?
Pastest's public descriptions checked on 6 September 2026 distinguish standalone Ask Pastest questions from support during question practice. They serve overlapping but different starting points.
Does an AI explanation count as independent question practice?
Not when you needed that explanation before selecting the answer. Keep assisted learning separate from unassisted assessment when interpreting your scores.
How should I compare AI tutors fairly?
Use the same original conceptual problem, attempt it first and test a changed example afterwards. This article does not report comparative scores because that evaluation was not run.