# SunMargin: Solar Calculator — Compare costs & payback plans

> Compare costs & payback plans (iPhone/iPad app by Thawatchai Boontan.)

- Source: https://appshunter.io/ios/app/sunmargin-solar-calculator/id6823236317 (this page in markdown: same URL + `.md`)
- Developer: [Thawatchai Boontan](https://appshunter.io/developer/1096487375)
- Category: Utilities, Finance
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 9 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more
- Released: 2026-10-19
- Data updated: 2026-11-06

## What is SunMargin?

Explore a solar quote using your own assumptions. Compare projected costs and savings before deciding what to investigate further.

- Enter installation cost, generation and consumption assumptions.
- Set import prices, export credits and operating costs.
- Review projections and sensitivity to changing inputs.
- Save scenarios and export results as CSV.

Your records are stored on your device. Export backups before changing devices. Free includes 1 saved scenario. An optional one-time Lifetime Pro purchase expands the app's Free limits and adds private iCloud sync. No ads, no account and no subscription. Existing records and backups remain accessible after a refund or loss of Pro.

Projections depend on your inputs and are estimates, not guaranteed savings or financial advice.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| SunMargin Lifetime Pro | $9.99 | one-time |


## Is SunMargin safe?

Not enough ratings yet to assess SunMargin.

## Is SunMargin legit?

SunMargin: Solar Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for SunMargin is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-11-04

• Optimized for iPhone Duo: the app adapts to both the inner and outer displays.
• More reliable purchases and restores, with clearer messages if something goes wrong.
• Optional anonymous usage and crash reports help improve the app. Your records are never included, and you can turn this off in Settings.

### 1.0 — 2026-10-19

No release notes.

## More apps by Thawatchai Boontan

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All apps by Thawatchai Boontan: https://appshunter.io/developer/1096487375

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*