There is an argument to be made that Apple is better positioned to fight financially... However, the current administration tends to threaten blocking or mergers/acquisitions, or other red tape unless they comply. I doubt Apple would accept such financially damaging threats to protect ICEBlock's users.
(Personally, I am suspecting that they do try much more than some other companies, but again, the opacity makes it impossible to verify.)
As a side note, they do fight sometimes, they fought the EU's DMA for example, but in Russia and China, they complied without a fight though to my knowledge.
See? No laws broken, perfectly safe.
Apple has since confirmed in a statement provided to Ars that the US federal government "prohibited" the company "from sharing any information," but now that Wyden has outed the feds, Apple has updated its transparency reporting and will "detail these kinds of requests" in a separate section on push notifications in its next report.
On the other hand, Google isn't exactly working with the authorities either. They moved Google Maps' location history to on-device storage because of the many warrants they were served, for instance, and they too refuse to decrypt phones.
These companies know to pick their battles, but they did take on the government various times.
This is untrue at some technical level: Apple is currently unable to break AES-256.
The San Bernadino case was about having Apple create and sign new firmware that would enable a brute force attack - which could easily be unsuccessful. I don't believe the Secure Enclave found in newer models even allows for a brute force attack (enforcing some delay, among other things) from BFU state.