Comparison

SKI+ v2 Prem vs Sparrow

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

SKI+ v2 Prem

Secure IM with PQC for Ent.

About

SKI+ v2 Prem

Features

Read full description

SKI+ v2 is an end-to-end instant messaging app that utilizes post-quantum encryption algorithms. The encryption and decryption of messages are performed on the mobile device, and the server side cannot access the encryption/decryption details. The enterprise version supports messaging services and data localization, and provides autonomous account and permission management functions. For more details, please refer to https://www.e2eelab.org If you have any usage questions or suggestions, feel free to send related descriptions or screenshots to: ziv@citi.sinica.edu.tw We will address your inquiries as soon as possible.

About

Sparrow

Features

Read full description

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

SKI+ v2 Prem4 screens

Sparrow4 screens

Verdict

The call

SKI+ v2 Prem 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SKI+ v2 Prem ships an update every 2 weeks, Sparrow fortnightly. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

ScorecardNo meaningful differences

SKI+ v2 Prem versus Sparrow: the parameters behind the verdict, then further details
Parameter	SKI+ v2 Prem	Sparrow
Price	Free	Free
Update frequency	Every 2 weeks	Fortnightly — better
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	248 MB	110 MB
Age rating	4+	4+
Developer	Academia Sinica Research Center for Information Technology Innovation	XIAOFEI GLOBAL BRANDING PTE. LTD.

In-app purchases

None

SKI+ v2 Prem

No in-app purchases

None

Sparrow

No in-app purchases

Questions

Is SKI+ v2 Prem free?

SKI+ v2 Prem is free to download, with no in-app purchases.

Is Sparrow free?

Sparrow is free to download, with no in-app purchases.

Do SKI+ v2 Prem or Sparrow have ads?

Neither SKI+ v2 Prem nor Sparrow shows ads.

Which is updated more often, SKI+ v2 Prem or Sparrow?

SKI+ v2 Prem ships an update every 2 weeks, and Sparrow fortnightly. Most recently, SKI+ v2 Prem was updated on October 2, 2026 and Sparrow on October 9, 2026.