Comparison

Solar Planner vs Rool

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Solar Planner

Features
Read full description

App to calculate the solar production. The app calculates the reduced solar earnings compared to an optimal panel position. Two factors reduce the real solar earnings: 1. The direction and the tilt angle of the solar panel. 2. The shadowing due to buildings or trees. The yellow area in the picture shows the possible positions of the sun during the year. The brown area represents the ground to the horizon. Using augmented reality the shadowing is drawn directly on the screen by repainting the buildings or trees. The direction and the tilt angle of the solar panel are set by using the direction and tilt angle of the iPhone/iPad. Either by holding the iPhone/iPad in the direction of the sun. Or by laying the iPhone/iPad on the solar panel. (The tilt angle can be 90° at maximum.) The result of the calculation shows the solar earnings compared to the highest possible solar earning in percent. The solar earnings are also shown in a year diagram and a day diagram. The Calculations can be used for photovoltaic and solar heating systems. Used methodology: For every time during the year the position of the sun at the sky depending on the geographic location is calculated. The solarisation on the panel is calculated by taking into account the panel direction and the panel tilt angle. The solarization is summed up for all times without shadowing. The calculated solar earning of the calculated panel position is shown compared to the maximal possible solar earning in percent. Therms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Rool

This app provides a private cloud-based AI assistant to help you with tasks, projects, and file management. It allows you to chat with an AI, create and edit files, generate content, and collaborate with others in isolated project environments.

Highlights
  • Private cloud computer
  • AI-powered task completion
  • File upload and management
  • Content generation (text, code, images)
  • Persistent project memory
  • Collaborative work environments
  • Data export
Features
Read full description

Rool gives you a private computer in the cloud that you can talk to. Ask questions, create files, solve problems, and work through projects with an AI that builds on what you’ve already done. Each Rool Machine brings your conversations, files, and memory together. It can run software and carry out tasks with multiple steps, helping you go from an idea to finished work through a familiar chat. WORK WITH YOUR FILES Upload documents, PDFs, images, spreadsheets, and code. Ask Rool to read, edit, organise, or create files for you. Turn notes into a report, work through calculations, or build an interactive HTML page. CREATE AND EXPLORE Draft ideas, generate images, write code, and compare different approaches. Refine the results through conversation and keep what you create alongside the rest of your project. BUILD ON YOUR WORK Rool connects your notes, conversations, files, and decisions through persistent memory. Return to a project with its context still available, and ask your AI to use earlier work when planning what comes next. MAKE ROOM FOR DIFFERENT PROJECTS Use separate Machines for personal projects, work, or shared interests. Each has its own files and memory, helping you keep different parts of your life organised. WORK TOGETHER Invite others into a Machine to collaborate with the same AI, files, and project history. Changes sync in real time, so everyone can work from the same information. PRIVATE BY DESIGN Your work is stored in your own isolated Machine, hosted in the EU. Rool has no ads and does not sell your data or share it for third-party AI training. You can export your data whenever you choose. AI INCLUDED Advanced AI is built in. Rool automatically selects models for the task, so you can focus on what you want to do. Start with a free plan that includes AI access, persistent memory, and file storage. Paid plans offer higher usage and storage limits. Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Solar Planner4 screens
Rool4 screens

Verdict

The call

The clearest difference is ads: Rool at none against Solar Planner's shown. Rool also leads on iOS requirement (15.0 vs 17.0). Solar Planner's advantage is update cadence (daily vs fortnightly). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Solar Planner sells 3 in-app purchases, starting at $3.99 per 7 days and Rool sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Solar Planner ships an update daily, Rool fortnightly. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 6 level
Solar Planner versus Rool: the parameters behind the verdict, then further details
ParameterSolar PlannerRool
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyDaily — betterFortnightly
AdsYesNo — better
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size7 MB11 MB
Age rating4+17+
DeveloperSophisticated Engineering UG (haftungsbeschrankt)Lightpost One Limited

In-app purchases

3 purchases

Solar Planner

Subscriptions3
  • worldwide - 1 week$3.997 Days
  • worldwide - 1 month$8.991 Month
  • worldwide - 1 year$89.991 Year
2 purchases

Rool

Subscriptions2
  • Plus$12.991 Month
  • Pro$29.991 Month

Questions

Is Solar Planner free?
Solar Planner is free to download, with in-app purchases available.
Is Rool free?
Rool is free to download, with in-app purchases available.
Do Solar Planner or Rool have ads?
Solar Planner shows ads; Rool does not.
Which is updated more often, Solar Planner or Rool?
Solar Planner ships an update daily, and Rool fortnightly. Most recently, Solar Planner was updated on October 11, 2026 and Rool on October 2, 2026.

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