Ulearn vs HVAC PT Chart Toolkit

An all-in-one local media & file manager, centralize all your local videos, audio, documents, images and ZIP archives. Equipped with file transfer, privacy encryption, format converter and QR scanner to organize local files effortlessly. Core Features ● Local Video Player: Offline files only. Supports MP4, MOV, MKV, AVI, FLV, M2TS, M4V, TS, VOB, WMV, MPEG and more mainstream formats; ● Local Audio Player: Full format support including MP3, FLAC, APE, AAC, OGG, WAV, WMA for lossless local music playback; ● Document Viewer: Open PDF, Word, TXT, HTML, PPT, Numbers, Pages, Keynote office files; ● Privacy Protection: Fingerprint / gesture lock, file encryption & decryption for private data; ● Local image browsing & editing; ● ZIP archive compression & extraction; ● Multi-way file transfer: Wi-Fi LAN transfer, iTunes wired transfer, device-to-device sharing; ● Local audio & video format converter; ● QR & barcode scanner, QR code generator; ● Playback history, incognito local playback, custom skip intro/outro for media files; ● Markdown preview & editing support. All core features above are available for free users. Subscribe to unlock all premium perks, remove in-app ads and access batch encryption, incognito playback and other advanced tools. Auto-Renewable Membership Terms Auto-renew subscriptions: Monthly $0.99 / Month, Yearly $6.99 / Year Lifetime one-time purchase: $17.99. One single payment for permanent full premium access, no recurring charges. Subscription Rules Payment will be charged to your Apple Account upon purchase confirmation. Subscriptions auto-renew, and renewal fees will be charged 24 hours prior to the end of each billing cycle. To turn off auto-renewal, go to [Settings > Apple Account > Subscriptions] at least 24 hours before your current period expires. Your membership access remains active until the end of the paid billing cycle after cancellation. If you reinstall the app or switch devices, log in with your original purchase Apple ID and tap [Restore Purchase] to recover your membership at no extra cost. Support & Legal Links For billing issues, missing premium access or function errors, visit our official support page or email us: xiaodeve@163.com Terms of Use: https://xiaodev.com.cn/terms.html Privacy Policy: https://xiaodev.com.cn/privacy.html App Support Page: https://xiaodev.com.cn/support.html This app only processes locally stored files and provides offline media & file management functions solely. Report bugs or compatibility issues via email: xiaodeve@163.com.

HVAC PT Chart Toolkit is an offline field workspace for technicians working on air conditioners, refrigeration systems, cold rooms, chillers and freezers. It is designed for paid, professional use: no account, no ads, no subscription and no server connection. Core tools: • Refrigerant PT charts for common refrigerants • Pressure to saturation temperature and temperature to pressure lookup • Superheat and subcooling calculators • Unit conversion for pressure, temperature, length, mass/charge, current/power, capacitance/resistance and vacuum/pressure • Offline fault code lookup • Symptom-based diagnostic checklists • Repair records, quotes, customer signatures and photos • PDF and image work order export • English and Simplified Chinese interface • Light, dark and system appearance modes Field workflow: 1. Search a refrigerant, fault code or tool 2. Calculate PT, superheat or subcooling 3. Follow a repair checklist 4. Add readings, photos, parts and labor 5. Capture a signature 6. Export a PDF or image repair order This app does not attempt to automatically diagnose equipment. Results are for field reference only and should be checked against the equipment nameplate, manufacturer documentation and actual site conditions. Electrical, high-pressure and flammable refrigerant work should be performed by qualified technicians following applicable safety rules. All data is stored locally on your device. Repair records are not uploaded. The app can be used in airplane mode.