SunCast vs SunQuest: which sunlight planner goes further?
SunCast and SunQuest are close competitors: both combine AR sun paths, 3D building and terrain shadows, Street View, weather, and building solar information. SunCast shows terrain shade with finer visual detail, then takes the planning workflow further with user-placed structures and native solar alarms. SunQuest branches into extended forecasts, outdoor map styles, and Mac support.
By Peter Szucs Last reviewed: August 5, 2026
Quick verdict
For a complete sunlight-planning workflow on iPhone and iPad, SunCast is the stronger choice. Its terrain shadows are easier to read at a specific location, and it adds adjustable planned structures and native alarms that carry the decision from exploration to action. Both apps provide building solar information. SunQuest makes more sense when a broader 10-day forecast, its outdoor and winter-sports map, or Mac support matter more.
This comparison uses full feature sets and intentionally avoids pricing differences.
SunCast is strongest for
- Adding planned structures to a real 3D shadow scene
- Setting native alarms after finding the right solar event
- Keeping maps, Street View, construction, cloud cover, and alarms in one focused flow
SunQuest may still fit for
- Broader 10-day weather and UV context
- Mac users and outdoor planners who want a winter-sports map
Side-by-side feature comparison
| Feature | SunCast | SunQuest | Why it matters |
|---|---|---|---|
| AR sun path | Yes | Yes | Helps you visualize the sun's trajectory and lighting conditions before they occur. |
| Interactive map planning | 3D shadow map | 3D maps + hour mode | Lets you plan sunlight at any location before arriving. |
| Terrain shadow readability | Finer terrain shadows | Coarser terrain shadows | Reveals whether buildings or terrain will block the light you need. |
| Custom construction shadow simulation | Adjustable 3D structures | No | Shows how proposed buildings could change surrounding light before they appear on the map. |
| Building solar information | Yes | Yes | Provides building-level solar potential, panel capacity, annual sunshine, and estimated energy output. |
| Street-view remote scouting | Sun path in Street View | Sun path in Street View | Lets you inspect a distant location's sun path without being there. |
| Cloud and weather context | Hourly cloud cover | 10-day detailed forecast | Shows whether cloud cover may hide the light or shadows you planned for. |
| Solar event alarms | Native solar alarms | No | Turns a chosen solar event into a reminder or wake-up alarm. |
Why SunCast?
It makes terrain shade easier to read
SunCast shows a finer terrain-shadow boundary that follows the landform more closely, helping you see where shade begins and how it moves across a slope, ridge, or valley.
It can change the scene, not only inspect it
SunQuest is strong at showing shadows from the buildings and terrain already on the map. SunCast also lets you place, size, rotate, and save planned structures, then inspect the shadows they would add.
It carries the plan into the day
After you find the right light window, a native Solar Alarm can turn that plan into a reminder or wake-up that is built around the event itself.
Detailed comparison
Terrain-shadow readability and site planning
SunCast. SunCast presents terrain shade with a more continuous, landform-following edge. This makes the boundary of shade easier to inspect when a ridge, valley, slope, property, or camera position is the question. Select a mapped building to see its roof solar potential, panel capacity, annual sunshine, and estimated energy output alongside the wider site-planning tools. SunCast renders shadows from mapped buildings when you are inspecting buildings. Its terrain view separately renders terrain shade, while Construction Mode lets you add, position, rotate, resize, and save planned structures to test their building shadows. That extra layer matters for an extension, neighboring development, garden structure, renovation, or early site study where the future shadow is the question.
SunQuest. SunQuest renders terrain shade on its 3D maps, but its shaded areas are less detailed, making the exact edge of shade harder to read. It remains useful for a general read of current site conditions. SunQuest also offers building-level rooftop potential and production estimates. Neither app has a simple advantage when building solar information is the deciding requirement.
Remote scouting and conditions
SunCast. SunCast pairs a ground-level Street View sun path with a broader map of building and terrain shadows, helping you move between the panorama and the surrounding light pattern. Hourly cloud cover adds a direct check for shoots and outdoor plans where the intended sunlight may be hidden even when the geometry is right.
SunQuest. SunQuest also combines Street View sun paths with building and terrain shadow maps, so neither app has a simple advantage for inspecting an existing location remotely. Its 10-day forecast, detailed weather information, UV context, and dedicated outdoor and winter-sports map make SunQuest stronger when weather range or mountain activity planning leads the decision.
From planning to action
SunCast. SunCast can set native alarms for sunrise, sunset, golden hour, blue hour, twilight, solar noon, and other solar events, including time-critical wake-ups. SunCast keeps the full path from location scouting through shadow testing, construction checks, forecast context, and alarms inside a visual planning experience.
SunQuest. SunQuest runs on iPhone, iPad, and Apple-silicon Macs, which gives it an advantage when desktop access is part of the workflow. SunQuest provides the event times and conditions needed to plan, but it does not turn a chosen solar event into a native alarm. SunCast closes that final gap.
Bottom line
SunCast is the more complete sunlight planner when a real location drives the decision. Its terrain shadows are easier to read, and it adds custom planned structures and native solar alarms to the shared foundation of AR, Street View, weather, and building solar information. SunQuest may suit users who prioritize broader forecast detail, Mac support, or its outdoor map styles.
Try SunCast
SunCast combines AR sun path, 3D shadows, street-view scouting, cloud cover, Construction Mode, and Solar Alarm for iPhone and iPad sunlight planning.
Frequently asked questions
How do SunCast and SunQuest terrain shadows differ?
SunCast shows a finer, more continuous terrain-shadow edge that is easier to follow across the landform. SunQuest also shows terrain shade, but its visual result is coarser and changes in more noticeable steps. Both apps can help assess an existing location; SunCast is the better fit when the exact shape of terrain shade matters.
Do SunCast and SunQuest both have Street View and weather?
Yes. Both support Street View sun paths and weather-aware planning. SunCast provides hourly cloud cover inside its focused lighting workflow; SunQuest offers a broader 10-day forecast with additional weather and UV context.
Should I choose SunCast or SunQuest?
Choose SunCast for the more complete iPhone and iPad sunlight workflow, especially when planned-building shadows or native solar alarms matter. Choose SunQuest when rooftop energy estimates, extended weather detail, outdoor map styles, or Mac support are more important.
