# PJConverter vs TCL极光

The clearest difference is price: TCL极光 at Free against PJConverter's $0.99. TCL极光 also leads on update cadence (every 8 days vs every 7 months) and iOS requirement (14.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

TCL极光 is free to download; PJConverter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PJConverter ships an update every 7 months, TCL极光 every 8 days. The most recent releases landed on September 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | PJConverter | TCL极光 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/tcl/id6451133950/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 8 days** |
| Monetization | Paid | **Free** |
| Size | 6 MB | 224 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Zhikang Qin](https://appshunter.io/developer/1123601166) | [惠州TCL光伏科技有限公司](https://appshunter.io/developer/1671107368) |

## What reviewers say

### PJConverter

[App page](https://appshunter.io/ios/app/pjconverter/id1123601167)

This tool offers precise coordinate transformations for GIS, surveying, and engineering professionals. It supports thousands of global coordinate systems and allows for custom projection creation with real-time validation and visual previews. Streamline your spatial data management with this efficient utility.

**Highlights:** Professional-grade conversion engine, Extensive library of coordinate systems, Customizable projection creation, Visual projection previews, Flexible format support, Intuitive user interface

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

**In-app purchases:** none


### TCL极光

[App page](https://appshunter.io/ios/app/tcl/id6451133950)

This app focuses on distributed photovoltaic systems for homes and businesses. It aims to be a leading smart new energy service provider, offering a platform for asset development, construction, and operation in the solar energy sector.

**Highlights:** Distributed photovoltaic systems, Household solar solutions, Commercial solar solutions, Overseas solar and storage pump market, Asset development platform, Construction and operation services

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PJConverter free?

PJConverter costs $0.99, with no in-app purchases.

### Is TCL极光 free?

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

### Do PJConverter or TCL极光 have ads?

Neither PJConverter nor TCL极光 shows ads.

### Which is updated more often, PJConverter or TCL极光?

PJConverter ships an update every 7 months, and TCL极光 every 8 days. Most recently, PJConverter was updated on September 24, 2026 and TCL极光 on October 21, 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.*