why数理 vs TiYi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
why数理
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开发了三年的v1.0版即将发布，功能是此版的十倍。 本应用是一个为高中理科题设计的App，仅限讨论理科题目（数理化生等）。应用的主页展示关注的题目、待回答的题目等内容。题目页显示讨论的理科题。应用包含通知页。应用其余功能位于"我的"页，包括分屏、搜索、收藏、配色、小功能、设置、检查更新等等。
TiYi
This app acts as a VPN client that allows you to import your existing VPN configurations from various sources. Connect to your authorized servers with a single tap, manage nodes, and choose your preferred routing modes. It offers a consistent experience across iPhone, iPad, and Mac.
- Import subscription URLs
- Supports various protocols (VMess, VLESS, Trojan, etc.)
- One-tap connection
- Node search and sorting
- Latency testing
- Multiple routing modes
- iCloud sync for profiles
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Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ TiYi is a bring-your-own-config VPN client. Import the subscriptions, share links, or files you already have, then connect in one tap. TiYi does not provide servers, plans, or paid nodes—you supply a remote configuration you are authorized to use. IMPORT • Subscription URLs with optional auto-update • Share links such as ss, VMess, VLESS, Trojan, and Hysteria2 • Clash configs, sing-box JSON, and WireGuard • OpenVPN (.ovpn) and IKEv2 • Clipboard and files; scan a QR code on iPhone • Open imports with the tiyi:// URL scheme CONNECT AND NODES • Connect or disconnect in one tap • Search nodes, sort by latency or name, group by region • Run latency tests and switch nodes quickly • Routing modes: Rule, Global, and Direct • Optionally include all networks • System HTTP proxy through the VPN tunnel ACROSS YOUR DEVICES • The same experience on iPhone, iPad, and Mac • Mac menu bar: connect, change routing, and switch profiles • Optional iCloud sync for profiles, with Wi-Fi-only if you prefer PRIVACY Profiles stay on device. If you enable iCloud sync, they sync only to your iCloud. TiYi does not operate nodes and does not sell connection data. Use only servers you own or are authorized to use, and follow the laws where you live.
Screenshots
Verdict
The clearest difference is in-app purchases: why数理 at none against TiYi's 3. why数理 also leads on ads (none vs shown) and iOS requirement (11.0 vs 18.0). TiYi's advantage is update cadence (every 5 days vs fortnightly). 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. TiYi sells 3 in-app purchases, starting at $0.99 per month. why数理 asks for nothing beyond the download.
why数理 ships an update fortnightly, TiYi every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | why数理 | TiYi |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.2 (6 ratings) — better |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Apple TV — better |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 71 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | 靖一 陈 | Weigan Technology (Shenzhen) Co., Ltd. |
In-app purchases
why数理
No in-app purchases
TiYi
- Upgrade to Monthly VIP3 Days trial$0.991 Month
- Upgrade to Yearly VIP3 Days trial$4.991 Year
- Upgrade to Lifetime VIP$9.99
