Open eLMS vs ∫dx
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Open eLMS
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Register to gain access to around 200 elearning courses (most CPD certified) aimed at business including (security, compliance, social awareness, IT, media.) The course material is aimed for the most part at awareness and onboarding and can work as effective material for onboarding employees into a business or when starting a new role within an organization. All courses feature video presenters and animation and tests and tracks learning to completion. All certification results are stored on the app and can be used for evidence at any time.
∫dx
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∫ dx: A-Level Maths Revision Getting good at A-Level Maths takes one thing: deliberate practice. Not more notes. Not another YouTube playlist. Questions, done consistently, until the methods become second nature. dx is built for exactly that. Smart revision that adapts to you dx tracks every question you rate as "needs work" or "partially got it" and brings it back at the right time - spacing reviews so you're drilling your weak spots, not wasting time on what you already know. AI hints that teach, not spoil Stuck on a question? Get a progressive hint that nudges you in the right direction without giving away the answer. Learn to think through problems, not just copy solutions. Full worked solutions Tap to reveal a step-by-step mark-scheme solution for every question. Not generic ChatGPT answers - structured worked examples built for A-Level Maths. What's inside: • Thousands of exam-style questions across Pure, Statistics, and Mechanics • Edexcel and OCR question banks • LaTeX rendering so every equation and diagram is crisp and readable • Daily 10 - a focused session mixing new questions with spaced review • Custom Practice - drill any topic, any category, any time • Progress tracking so you always know where you stand Free to start. Premium to go further. The core app is free. Premium unlocks unlimited AI hints, full worked solutions, and unlimited custom practice sessions. A-Level Maths rewards consistency. Use dx to build the habit, close the gaps, and hit the grade you're aiming for. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is device support: ∫dx at 3 against Open eLMS's —. Open eLMS's advantage is iOS requirement (13.4 vs 15.1). On price and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Open eLMS sells 1 one-off in-app purchase and ∫dx sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Open eLMS | ∫dx |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Monthly |
| Ads | — | No |
| In-app purchases | Yes | Yes |
| Devices | — | iPhone, iPad, iPod — better |
| Requires iOS | 13.4 — better | 15.1 |
| Further details — not scored | ||
| Size | 22 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Open eLMS Ltd. | PRANEEL AGRAWAL |
In-app purchases
Open eLMS
- Full version$5.99
∫dx
- dx Premium Monthly$4.991 Month
- dx Premium Annual$12.991 Year









