SKI+ v2 vs Sparrow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SKI+ v2
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SKI+ v2 is an end-to-end instant messaging app with in-depth support of post-quantum encryption algorithms. Message encryption and decryption are completed on the user's device, and the server has no access to these details. Therefore, it provides users with a more privacy-protected messaging system. For more details, please refer to https://www.e2eelab.org. Feel free to download and use it. If you have any questions or suggestions, please send relevant descriptions or screenshots to: ziv@citi.sinica.edu.tw. We will address your inquiries promptly.
Sparrow
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Sparrow 是一款端到端加密的即时通信 App。 • 一对一与群组消息、图片、视频，全程端到端加密 • 语音与视频通话 • 多设备同步 • 可封锁用户、检举内容、于 App 内删除帐号
Screenshots
Verdict
SKI+ v2 and Sparrow are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.
| Parameter | SKI+ v2 | Sparrow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 249 MB | 110 MB |
| Age rating | 4+ | 4+ |
| Developer | Academia Sinica Research Center for Information Technology Innovation | XIAOFEI GLOBAL BRANDING PTE. LTD. |
In-app purchases
SKI+ v2
No in-app purchases
Sparrow
No in-app purchases
