Coal 2 Solar vs SumHubs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Coal 2 Solar
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Coal to Solar is your smart solution for a cleaner, greener Mongolia. Designed specifically for the ger district community, this app helps households track their electricity usage, monitor the impact of their solar panels and electric heaters, and contribute to solving one of Mongolia's most pressing issues—air pollution. By transitioning from burning coal to solar energy and electric heating, you not only reduce harmful emissions but also earn carbon credits verified by Gold Standards. Track your progress, save on energy costs, and join the movement toward a sustainable future. Download Coal to Solar today and be part of URECA’s mission to transform Mongolia’s energy landscape and create healthier communities for generations to come.
SumHubs
Build custom online spaces for your users to connect, share information, and host events. This secure platform allows for community growth and tool integration without requiring any coding knowledge.
- Custom enterprise hubs
- User engagement tools
- Event hosting
- Information sharing
- No-code development
- Secure platform
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SumHubs helps you join trusted digital hubs created by the organizations and communities you are connected to. A hub is a simple space where you can receive updates, complete tasks, access resources, join discussions, and stay connected. Your hub may be created by your school, workplace, program, recruiter, service provider, training group, or community. Use SumHubs to: • Join hubs with an invite code, QR code, or link • Read important announcements • Access guides, documents, and resources • Complete forms, tasks, and next steps • Explore opportunities, events, and services • Join discussions with your community • Stay organized in one place SumHubs is built for people moving through important journeys — education, work, training, recruitment, programs, services, and community life. Instead of searching through scattered emails, chats, links, and documents, SumHubs gives you one trusted place to know what is happening and what to do next. Join your hub and stay connected.
Screenshots
Verdict
The clearest difference is update cadence: SumHubs at fortnightly against Coal 2 Solar's monthly. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Coal 2 Solar ships an update monthly, SumHubs fortnightly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.
| Parameter | Coal 2 Solar | SumHubs |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.5 — better |
| Further details — not scored | ||
| Size | 45 MB | 71 MB |
| Age rating | 4+ | 17+ |
| Developer | Ureca | SumHubs LLC |
In-app purchases
Coal 2 Solar
No in-app purchases
SumHubs
No in-app purchases









