LowLighter vs Chegg:
Which Study Tool Is Worth It?
Chegg built its business on textbook solutions. LowLighter is an AI overlay that can answer questions about anything on your screen in seconds. They're both aimed at students, but they work in fundamentally different ways.
March 17, 2026
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A Database vs. an AI Overlay
Chegg is a solutions database. It has step-by-step answers for millions of textbook problems, organized by book and chapter. You search for a question, and if it's in their system, you get the worked-out solution. If it's not, you can submit it to an expert and wait for a response.
LowLighter is an AI overlay that sits on top of your entire desktop. You press a hotkey, drag over anything on your screen, and an AI reads and responds to it instantly. It doesn't rely on a pre-built database. It generates answers in real time using AI vision models.
This difference in approach changes what each tool is good at. Chegg excels at curated, textbook-specific answers. LowLighter excels at answering anything, from any source, instantly.
How Chegg Works
The Chegg Study workflow:
- 1. Open Chegg in your browser
- 2. Search by textbook, ISBN, or question
- 3. Find the matching problem in the solutions database
- 4. Read the step-by-step answer
- 5. If it's not in the database, submit and wait (hours to days)
- 6. Switch back to your assignment
Chegg works well when you're working through a popular textbook and need exact solutions. The step-by-step breakdowns are usually thorough. The limitation is that you're locked into their database. If your professor uses custom problem sets, unpublished materials, or anything visual like a diagram, Chegg has nothing for you.
How LowLighter Works
- 1. Press a hotkey from any app
- 2. Drag over the problem on your screen
- 3. Read your answer in a floating popup
Three steps. No searching, no database lookup, no browser tab.
LowLighter uses AI vision to read the actual content on your screen. Point it at a math equation in a PDF and get the steps. Point it at a chemistry diagram and get an explanation. Point it at your professor's slide deck and ask what a concept means. The AI sees exactly what you see and responds in context.
Because it generates answers in real time, it's not limited to any specific textbook or question bank. It works with any content, from any source.
Side by Side Comparison
| LowLighter | Chegg | |
|---|---|---|
| How it works | AI reads your screen in real time | Pre-built textbook solutions |
| Speed | <1 - 4 seconds | Instant (if in database), hours if not |
| Works with custom problems | Yes, any question | No (database only) |
| Reads images and diagrams | Yes, anything on screen | No |
| Tab switching | None | Every time |
| Textbook-specific solutions | AI-generated (may differ from textbook key) | Exact solutions manual answers |
| Works beyond textbooks | Lectures, PDFs, videos, any app | Textbooks only |
| Privacy during screen share | Phantom Mode | Visible in browser |
| Translation | 35+ languages | English only |
When Chegg Is the Better Choice
Chegg has genuine advantages in specific scenarios:
Exact textbook solutions when your professor assigns problems from a major textbook and you need the solutions manual answer, not an AI interpretation
Expert Q&A threads where a Chegg expert has written a detailed, verified walkthrough for a complex problem
Textbook rentals since Chegg also rents physical and digital textbooks, which is a separate service LowLighter doesn't offer
If you need the exact answer from a specific edition of a textbook, Chegg's database is hard to beat. The solutions are curated by humans and matched to specific ISBNs.
When LowLighter Is the Better Choice
LowLighter wins for the vast majority of everyday studying:
Custom problem sets that your professor wrote or pulled from non-standard sources. Chegg won't have these. LowLighter answers them instantly.
Lecture slides and recordings where you're paused on a slide and need something explained. Drag over it and ask.
Diagrams, graphs, and images that contain information you can not just type into a search box. LowLighter reads them visually.
Speed when you're studying and need answers every few minutes without breaking concentration. No searching, no waiting.
Privacy during screen share with Phantom Mode. If you're on a Zoom call, LowLighter is invisible to everyone else. Chegg in your browser is not.
Non-textbook subjects like language learning, reading research papers, translating content, or working with code. Chegg is textbook-focused.
The reality is that most study time isn't spent on exact textbook problems. It's spent trying to understand concepts from slides, notes, PDFs, and practice materials. That's where LowLighter's screen-level AI makes the biggest difference.
Pricing Comparison
LowLighter
- ✓ 25 free AI responses (no card required)
- ✓ Basic: $9.99/month ยท Pro: $14.99/month
- ✓ Includes all features and Phantom Mode
Chegg Study
- ✓ No free tier (paywall from the start)
- ✓ $15.95/month for Chegg Study
- ✓ $19.95/month for Chegg Study Pack
LowLighter is cheaper at every tier and lets you try it for free before paying anything. Chegg requires a subscription before you can access any solutions.
The Verdict
Chegg is useful if you need exact textbook solutions from major publishers. If your entire coursework revolves around one textbook and you want the solutions manual, Chegg delivers that.
But studying is way more than textbook problems. When you're reviewing lecture slides, working through practice sets your professor wrote, reading PDFs, trying to understand diagrams, or just going through material quickly without interrupting your focus, LowLighter handles all of it. It works with any content on your screen, not just what's in a database.
LowLighter is also significantly cheaper, offers a free trial, works privately during screen shares, and supports 35+ languages. For most students, it's the more versatile and cost-effective choice.
Try It
LowLighter gives you 25 free AI responses with no credit card. Works on macOS and Windows. Try it alongside Chegg and see which one you reach for more.