# Constructors Prime vs Solstice Solar

Constructors Prime and Solstice Solar are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Constructors Prime ships an update every 5 weeks, Solstice Solar every 3 weeks. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Constructors Prime | Solstice Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 37 MB | 37 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Concrete Constructors LLC](https://appshunter.io/developer/1639523872) | [SOLSTICE SOLAR LLC](https://appshunter.io/developer/1856338125) |

## What reviewers say

### Constructors Prime

[App page](https://appshunter.io/ios/app/constructors-prime/id1639523870)

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### Solstice Solar

[App page](https://appshunter.io/ios/app/solstice-solar/id6755790946)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Constructors Prime free?

Constructors Prime is free to download, with no in-app purchases.

### Is Solstice Solar free?

Solstice Solar is free to download, with no in-app purchases.

### Do Constructors Prime or Solstice Solar have ads?

Neither Constructors Prime nor Solstice Solar shows ads.

### Which is updated more often, Constructors Prime or Solstice Solar?

Constructors Prime ships an update every 5 weeks, and Solstice Solar every 3 weeks. Most recently, Constructors Prime was updated on October 9, 2026 and Solstice Solar on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*