CloudLabs What is Light? vs Saras
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CloudLabs What is Light?
Explore the nature of light through interactive simulations. Classify natural and artificial light sources and experiment with how light interacts with various materials. This educational tool offers a hands-on approach to understanding fundamental physics concepts.
- Classify natural and artificial light sources
- Simulate light travel through materials
- Interactive educational experiments
- Understand light physics concepts
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In this simulation, it is necessary to classify, among several elements, those that generate natural light and those that generate artificial light. In addition, a test must be performed with different objects to identify the way in which light travels through different materials.
Saras
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Saras is a completely free, offline-first practice companion for India's JEE Main engineering entrance exam. No ads. No account. Your practice history stays on your device. WHAT YOU GET - 1,500+ questions across Physics, Chemistry and Mathematics, each with a clear step-by-step solution and a hint ladder. - Both question styles from the real paper: single-correct multiple choice and numerical-answer questions (about one in five), so your practice mirrors JEE Main. - Full JEE Main-pattern mock tests with a real exam timer and marking, followed by a question-by-question review. - Review your mistakes: every question you get wrong, in practice or in a mock, stays in Library → Questions until you get it right. Open it to see your answer, the right one and the solution, or practice the whole set again. - Save any question with one tap and revise your saved set whenever you like. - A day-by-day study plan to structure your revision. - A progress dashboard with per-subject accuracy and mastery, on-device, with no leaderboards. - A calm wellbeing corner with free Indian mental-health helplines and a short breathing exercise. - Works fully offline: the whole question bank, every solution and every formula are on your device. FREE, FOREVER No ads, no subscriptions and no in-app purchases: every subject and feature is unlocked for everyone. PRIVACY No account, no tracking. Your practice history stays on your device. IMPORTANT Saras is an independent study aid and is not affiliated with or endorsed by the NTA or any examination authority. Questions are original and exam-pattern, apart from a few past JEE questions marked PYQ in the app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://eswarvenigalla.substack.com/p/saras-privacy-policy Built by independent developers in India. Contact: saras.app.support@gmail.com
Screenshots
Verdict
The clearest difference is in-app purchases: CloudLabs What is Light? at none against Saras's 1. CloudLabs What is Light? also leads on iOS requirement (10.0 vs 17.0). Saras's advantage is update cadence (every 4 weeks vs every 6 months). On price, ads and device support 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. Saras sells 1 in-app purchase, starting at $2.99 per month. CloudLabs What is Light? asks for nothing beyond the download.
CloudLabs What is Light? ships an update every 6 months, Saras every 4 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.
| Parameter | CloudLabs What is Light? | Saras |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 171 MB | 14 MB |
| Age rating | 17+ | 4+ |
| Developer | Jiovany Orozco | Eswar Venigalla |
In-app purchases
CloudLabs What is Light?
No in-app purchases
Saras
- Remove Ads (Monthly)$2.991 Month
Questions
Is CloudLabs What is Light? free?
Is Saras free?
Do CloudLabs What is Light? or Saras have ads?
Which is updated more often, CloudLabs What is Light? or Saras?
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