PJConverter vs SmartClean
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PJConverter
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.
- Professional-grade conversion engine
- Extensive library of coordinate systems
- Customizable projection creation
- Visual projection previews
- Flexible format support
- Intuitive user interface
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PJ Converter is the ultimate coordinate conversion tool designed for professionals and students in Geographic Information Systems (GIS), surveying, engineering, and related fields. Whether you're working with geodetic or projected coordinates, it delivers unparalleled accuracy and ease of use. Key Features * Professional-Grade Conversion Engine: Powered by the widely-used PROJ library to ensure every calculation is accurate and reliable. It supports forward, inverse, and full coordinate transformation pipelines to meet the most demanding professional needs. * Vast Coordinate System Library: Comes with thousands of built-in Coordinate Reference Systems (CRS) from authoritative sources like EPSG, covering the entire globe. The powerful search helps you find what you need in seconds. * Advanced Custom Projections: Need something specific? Easily create, edit, and manage your own projection definitions. The editor provides real-time syntax validation and ID conflict detection to make complex configurations foolproof. * Visual Projection Preview: Instantly generate a world map preview for any coordinate system. Visually assess a projection's distortion, area of use, and characteristics before you apply it. No more guesswork. * Flexible Formatting: Seamlessly switch between degrees (DMS) and radians for geographic coordinates. Pick coordinates visually from an integrated map to meet diverse data input and display requirements. * Simple & Efficient Experience: The "Recents" list automatically saves your frequently used projections for quick access. The entire interface is clean and focused, letting you perform conversions without distraction. PJ Converter is the ideal choice for field engineers, GIS analysts, geography students, and anyone who works with spatial data. Download now and make complex coordinate conversions simpler and more efficient than ever before.
SmartClean
This utility app helps organize your iPhone by detecting and removing duplicate files like photos, videos, and contacts. It also offers smart media grouping and animated charging features to enhance device efficiency and user experience.
- Duplicate photo, video, and contact removal
- Smart media organization
- Animated charging screen
- Storage space optimization
- Device performance boost
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SmartClean is your ultimate solution for keeping your iPhone organized and efficient. Free up space and boost performance with powerful features like: - Duplicate Cleaner: Automatically detect and remove duplicate photos, videos, and contacts with ease. - Smart Organizing: Group similar photos and manage your media quickly. - Animated Charging: Add fun animations while your device charges, making every charge an exciting experience. Keep your iPhone clean, efficient, and fun with SmartClean! License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Police: https://smartcleanios.com/privacy.html
Screenshots
Verdict
The clearest difference is price: SmartClean at Free against PJConverter's $0.99. SmartClean also leads on update cadence (monthly vs every 7 months) and iOS requirement (15.0 vs 17.0). PJConverter's advantage is in-app purchases (none vs 4). On review sentiment, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
SmartClean is free to download; PJConverter costs $0.99 up front. SmartClean sells 4 in-app purchases, starting at $12.99 per 7 days. PJConverter asks for nothing beyond the download.
PJConverter ships an update every 7 months, SmartClean monthly. The most recent releases landed on September 24, 2026 and October 16, 2026 respectively.
| Parameter | PJConverter | SmartClean |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 4.0 (26 ratings) — better |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| Number of ratings | — | 26 — better |
| Update frequency | Every 7 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Zhikang Qin | Green Soft FZE LLC |
Customer experience
PJConverter
SmartClean
In-app purchases
PJConverter
No in-app purchases
SmartClean
- Premium Weekly Access3 Days trial$12.997 Days
- Month Trial1 Month trial$29.991 Month
- Premium Year$59.991 Year
- Lifetime Access$49.99









