| KSign | ESign | iClone | |
|---|---|---|---|
| Code base | Built on Feather | Original app | Built on ESign 5.0.2 |
| Source code | Open source (GPL-3.0) | Not public | Not public |
| Where to get it | GitHub releases | Third-party download sites | iclone.download |
| Certificate files | .p12 + .mobileprovision | .p12 + .mobileprovision | .p12 + .mobileprovision |
| Sources | AltStore-compatible repos | ESign sources | ESign-compatible sources and the built-in iClone Store |
| Interface languages | Several, see its GitHub page | Chinese and English | 15 languages |
| Online installation with your certificate | Not part of the app | Not part of the app | Yes, on iclone.download |
What is KSign?
KSign is an iOS signing app published on GitHub by Nyasami, with Khoindvn as product manager. It is built on Feather, another open-source signer, and describes itself as a cleaner ESign. It is not made by the ESign developer.
Recent KSign releases added iOS 26 optimizations, bulk installation and tweak injection into app extensions. Since version 1.5.1 it no longer accepts the older .ksign certificate format, so keep your original .p12 and .mobileprovision files.
Which one should you use?
- Choose KSign if you want an open-source app, install from GitHub releases and use AltStore-style repos.
- Choose ESign if you are used to the original app and only need Chinese or English.
- Choose iClone if you want ESign’s workflow (multiple app copies, tweak injection, ESign sources) with 15 interface languages, a reviewed built-in source, in-app updates and online installation with your own certificate.
Moving your certificate between KSign and iClone
A certificate is not tied to the signing app. Import the same .p12 file, its password and the matching .mobileprovision into KSign or iClone and both can sign with it. The step-by-step instructions are in how to import a certificate.
Get iClone
Download the IPA, or install iClone online with your own certificate. The certificate is imported into iClone automatically.
Frequently asked questions
Is KSign made by the ESign developer?
No. KSign is a separate open-source project built on Feather. It only aims to feel familiar to ESign users.
Can I use my KSign certificate in iClone?
Yes, as long as you have the .p12 file, its password and the .mobileprovision profile. The old .ksign format is not needed.
Can KSign and iClone be installed together?
Yes. They are separate apps, so you can keep both on the same iPhone.
Where can I download KSign?
From the official KSign releases on GitHub. iclone.download does not host KSign.
My KSign apps stopped opening. What happened?
Usually the certificate was revoked by Apple or has expired. This affects every signer, not just KSign. See what to do when a certificate is revoked.