duck.co and e6b.org are both overseas tools and are often compared head-to-head. This page lines them up item by item — rating, price, China accessibility, HQ, payments and refund policy — and ends with practical "which to pick" guidance.
On balance, duck.co comes out slightly ahead — it offers Higher overall rating (9.0 vs 6.0). That said, e6b.org has its strengths too: Better mainland China accessibility. If that matters more to you, e6b.org is well worth considering.
| Comparison | duck.co | e6b.org |
|---|---|---|
| Category | 📦 tools 隐私搜索 |
📦 tools 航空计算器 |
| Overall rating | 9.0/10 | 6.0/10 |
| Monthly price | N/A | N/A |
| Yearly price | — | — |
| China access | ★☆☆ Partial (proxy needed) |
★★★ Direct access |
| HQ | United States | Canada |
| Network | — | — |
| Payment methods | — | — |
| Refund guarantee | — | — |
| Editor notes | 不追踪用户，内置AI问答，适合隐私敏感用户 |
免费航空计算尺练习应用，适合飞行学习。 |
| Data source | In-depth review | In-depth review |
The guidance above is auto-compiled by TG4G from public data and is not purchase advice. Always rely on the official site and your own testing. A green cell marks the better value on that dimension (higher rating / CN / refund, or lower price). Some links are affiliate links (rel="sponsored nofollow").
If you want all-round balance and reputation, choose duck.co; if your core need happens to be e6b.org's strength (Better mainland China accessibility), then e6b.org is the better fit. Either way, trial the cheapest plan for a week before committing long-term.
This page is a side-by-side reference, not purchase advice; prices and policies are per the official sites, and some links are affiliate.