# SolarGPS2 vs Collateral Appraisal

The clearest difference is update cadence: SolarGPS2 at monthly against Collateral Appraisal's every 2 months. SolarGPS2 also leads on iOS requirement (12.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

SolarGPS2 ships an update monthly, Collateral Appraisal every 2 months. The most recent releases landed on September 16, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | SolarGPS2 | Collateral Appraisal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 21 MB | 57 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [维刚 王](https://appshunter.io/developer/913823126) | [Chung-Wei Hung](https://appshunter.io/developer/1730641431) |

## What reviewers say

### SolarGPS2

[App page](https://appshunter.io/ios/app/solargps2/id1495788735)

**Features:** macOS Compatibility

**In-app purchases:** none


### Collateral Appraisal

[App page](https://appshunter.io/ios/app/collateral-appraisal/id6477914477)

**In-app purchases:** none


## Frequently asked questions

### Is SolarGPS2 free?

SolarGPS2 is free to download, with no in-app purchases.

### Is Collateral Appraisal free?

Collateral Appraisal is free to download, with no in-app purchases.

### Do SolarGPS2 or Collateral Appraisal have ads?

Neither SolarGPS2 nor Collateral Appraisal shows ads.

### Which is updated more often, SolarGPS2 or Collateral Appraisal?

SolarGPS2 ships an update monthly, and Collateral Appraisal every 2 months. Most recently, SolarGPS2 was updated on September 16, 2026 and Collateral Appraisal on September 12, 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.*