D520 vs BBStelnet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
D520
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起重機荷重保護 產品特性: ● 顯示型荷重超載限制器可對起重設備進行顯示和警報,當起吊物品時,傳感器產生變形,顯示型荷重超載限制器可以指 示出載荷的數值。 ● 高亮度紅色LED顯示螢幕 ● 重量過載異常時,蜂鳴器會發出警示音提醒操作人員,增強安全性。 ● 當重量超過額定負重時,超載控制器會自動切斷起升機構的動力源,避免事故發生
BBStelnet
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BBStelnet — A minimalist BBS terminal designed exclusively for iPhone. Built with native SwiftUI for fluid performance and excellent battery efficiency. [Supported Servers] • PTT — secure WebSocket (WSS) connection • Bahamut, Hua Kui, and any Telnet / WebSocket BBS • Custom host / port; save multiple servers and accounts [Full Chinese Support] • Dual BIG5 / UTF-8 encoding with built-in Big5-UAO character mapping (25,916 characters) • Built-in Bopomofo (Zhuyin) input method with familiar key layout • Clean rendering of PTT push messages, posts, and mail — no garbled text [Reading Experience] • 14 ambient sounds (rain, waves, thunderstorm, waterfall, campfire, and more) for immersive reading • Full 16-color ANSI palette customization • Adjustable font family and size • Portrait / landscape rotation [Productivity Tools] • Floating keyboard for one-tap BBS commands • Quick Keys with cross-page paging, sorting, and grouping — kaomoji, arrow keys, and edit commands all included • Auto-login scripts and keep-alive (no idle disconnects) • Automatic URL detection in articles; built-in pinch-zoom image viewer [BBStelnet Pro — One-time purchase, unlocks forever] • Permanently remove ads (banner + interstitial) • Unlock 10 additional ambient sounds • Data export / import — back up sites, quick keys, and floating keyboard layouts in one tap Also available as consumable add-ons: Quick Key +10 cells, Station +5 slots — purchase as needed. Actively maintained by the developer. Welcome to all BBS enthusiasts and longtime PTT users.
Screenshots
Verdict
The clearest difference is in-app purchases: D520 at none against BBStelnet's 3. D520 also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.6). BBStelnet's advantage is update cadence (every 9 days vs every 4 months). On price 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
Both are free to download. BBStelnet sells 3 one-off in-app purchases. D520 asks for nothing beyond the download.
D520 ships an update every 4 months, BBStelnet every 9 days. The most recent releases landed on October 29, 2026 and October 9, 2026 respectively.
| Parameter | D520 | BBStelnet |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 12 MB |
| Age rating | 4+ | 17+ |
| Developer | SYSCODE INTERNATIONAL INC. | Hsu Chia-cheng |
In-app purchases
D520
No in-app purchases
BBStelnet
- Quick Key Cells +10$0.99
- Station Slots +5$0.99
- BBStelnet Pro$9.99









