This comparison comes down to one question: does your studying start in a lecture theatre or at a desk?
Turbo AI is built around the room. It records a live lecture, transcribes it, and turns it into notes, flashcards, practice questions and a podcast. Nothing NotebookLM does replaces that, because NotebookLM cannot record anything.
NotebookLM, renamed Gemini Notebook by Google in July 2026, starts from documents you already have and refuses to say anything that is not in them, with citations back to the passage. It is free for realistic student workloads.
Round by round
Five jobs a student actually needs doing, and which of the two does each one better.
Round 1
Capturing a live lecture
Turbo AI
This is the whole reason Turbo exists and it has no competition here. Open the app, hit record, and it captures the lecture, transcribes it, and produces structured notes with chapters, filtering the conversation around you rather than transcribing the whole room. NotebookLM has no recording function at all. If your bottleneck is capture rather than comprehension, this round decides the comparison and you can stop reading.
Round 2
Trusting what comes out
NotebookLM
NotebookLM answers only from the sources you gave it, with citations back to the passage, so the summary is a summary of your lecture rather than of the topic in general. Turbo is where the complaints concentrate, and they are specific: reviewers describe a two-hour recording failing to save, another capturing only 25 minutes of a two-hour lecture, and note generation stalling at 91%. Recording also stops if you leave the app, so you cannot check a message mid-lecture. In fairness, note quality is not a common complaint. The problem is capture reliability, not writing.
Round 3
Finding out what it costs
NotebookLM
NotebookLM publishes its pricing: a free tier, then Google AI Plus from $4.99 a month. Turbo AI is $19.99 a month or $119.88 a year, but you will not find that anywhere on turbo.ai. It has no pricing page, and the three tiers named in its terms carry no prices, so the figures only appear once you reach the paywall inside the app. Its free tier is worse: the caps are unpublished and tight enough to run out within days.
Round 4
Studying on your phone
Turbo AI
Turbo is on web, iOS and Android and is built mobile-first, which follows from a product designed to be opened in a lecture theatre. Its generated podcasts are genuinely useful commuting material. NotebookLM is web only. Its Audio Overviews, a two-host discussion generated from your sources, are the best version of that feature anywhere and partly close the gap, but you are still starting from a laptop.
Round 5
What happens when it breaks
NotebookLM
Turbo’s terms state that all sales are final outside a verified technical malfunction, which sits badly next to the recording failures above, and several users report being charged for an annual plan when they expected a trial. The honest counterweight: Turbo is rated 4.7 on both stores across roughly 351,000 ratings, and its poor Trustpilot score rests on about 20 reviews, which tells you what goes wrong without telling you how often. NotebookLM wins this round not by having better support but by not requiring any. There is no card, no renewal and nothing to dispute.
At a glance
Turbo AI
vs
NotebookLM
Lecture recorder and note generator
What it is
Source-grounded notebook with citations
Yes, the core feature
Records live lectures
No
$19.99/mo or $119.88/yr
Price
Free. From $4.99/mo via Google AI Plus
Tight monthly caps, unpublished
Free tier
50 sources per notebook, 50 chats a day
All sales final, per its terms
Refunds
Standard Google subscription
Web, iOS, Android
Platforms
Web only
Who should pick which
These barely overlap once you know where your material comes from, so the choice is mostly decided before you compare features.
Pick Turbo AI if
- You need live lectures captured and nothing else will do
- Most of your studying happens on a phone in short gaps
- You want a podcast of the lecture for the commute
- Your bottleneck is getting from three hours of audio to readable notes
Pick NotebookLM if
- You already have the slides and readings
- Budget is the deciding factor, or you will not enter a card
- You cannot afford a recording to fail silently
- You want every claim traceable to a passage in your own source
A third option, and it is ours
Both of these are intake tools. They leave you holding a much nicer pile of material and the same original problem: at some point you have to produce this yourself, under time pressure, with nothing in front of you. Neither one ever asks you to.
That is what Akono does instead, and it is ours, so weigh this accordingly. Same input, your slides or recordings, but it builds a course from them and runs sessions where a tutor asks the questions, reads what you wrote, and picks the next question from your answer. What you misunderstand stays on file until you can state it correctly. The plan works backwards from your exam date.
Where it is honestly the wrong tool: it does not record lectures, it is built for exams weeks out rather than tonight, it is weaker for pure calculation drilling, and there is no free tier. A 3-day trial, card required, then €11.99 a month or €59.88 a year. If free is non-negotiable, take NotebookLM from this page and ignore this section.