# Dr. Tracker vs PV Calculator Lite Version

The clearest difference is iOS requirement: Dr. Tracker at 9.0 against PV Calculator Lite Version's 13.4. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Dr. Tracker ships an update weekly, PV Calculator Lite Version every 10 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | Dr. Tracker | PV Calculator Lite Version |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pv-calculator-lite-version/id6459019012/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | — | Free |
| Size | 30 MB | 38 MB |
| Requires iOS | **9.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lingyang Technology (Hangzhou) Co., Ltd.](https://appshunter.io/developer/1597684575) | [Sven Schwertner](https://appshunter.io/developer/1700478261) |

## What reviewers say

### Dr. Tracker

[App page](https://appshunter.io/ios/app/dr-tracker/id1597684573)

**Features:** macOS Compatibility

**In-app purchases:** none


### PV Calculator Lite Version

[App page](https://appshunter.io/ios/app/pv-calculator-lite-version/id6459019012)

Estimate the potential of solar energy generation at your location. This tool offers detailed calculations for electricity fed into the grid, purchased electricity, annual savings, and payback time. It features site-specific solar irradiance and hourly resolution for accurate production and storage planning.

**Highlights:** Calculate electricity fed into grid and purchased, Estimate annual savings and payback time, Site-specific solar irradiance data, Hourly resolution for production and storage, Define PV modules, inverters, and load profiles, Automatic optimal orientation determination, Roof area measurement and panel positioning

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

**In-app purchases:** none


## Frequently asked questions

### Is Dr. Tracker free?

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

### Is PV Calculator Lite Version free?

PV Calculator Lite Version is free to download, with no in-app purchases.

### Do Dr. Tracker or PV Calculator Lite Version have ads?

Neither Dr. Tracker nor PV Calculator Lite Version shows ads.

### Which is updated more often, Dr. Tracker or PV Calculator Lite Version?

Dr. Tracker ships an update weekly, and PV Calculator Lite Version every 10 days. Most recently, Dr. Tracker was updated on November 3, 2026 and PV Calculator Lite Version on November 3, 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.*