Can Gemma 4 E4B run on iPhone 17?
YES — Runs, barely
Grade B · 60/100 · formula estimate
What this means
Our estimate says Gemma 4 E4B should fit, but there is very little memory left for the operating system and other apps.
Download the Q3_K_M version, which is about 4.1 GB. We expect it to use about 5.2 GB of the roughly 5.2 GB available to a model on this phone.
At the estimated speed, a roughly 300-word answer may take about 53 seconds to finish.
This result is calculated from the phone and model specifications. It has not been measured on this exact phone and setup.
7.5tokens/s
estimated · reading pace
5.2GB
needed at Q3_K_M
Q3_K_M
quant checked
B
grade · 60/100
needs 5.2 GBusable 5.2 GB
Apple A198 GB RAMMetal
Make it bearable
1
Drop context to 2K — saves ~0.2 GB of KV cache and a little speed.
2
Close every other app before loading — the 0 GB headroom is real; iOS may evict the model otherwise.
3
Expect throttling after ~10 min of sustained generation on a phone chassis.
See how fast it feels
Estimated at 7.5 tokens/s — reading pace. A ~300-word reply takes about 53 seconds on this phone.
Where the memory goes
| Component | Detail | GB |
|---|---|---|
| Model weights | Q3_K_M GGUF (4.1 GB) + mmap overhead | 4.3 |
| KV cache | 4K context window | 0.3 |
| Runtime | llama.cpp + app overhead | 0.6 |
| Total needed | at Q3_K_M, 4K context | 5.2 |
| Usable on iPhone 17 | 8 GB RAM − iOS reserve (jetsam limit) | 5.2 |
| Headroom | left for the OS and your other apps | 0 |
Pick your quant
| Quant | Download | Verdict | Speed |
|---|---|---|---|
| Q3_K_M BEST HERE | 4.1 GB | ! Runs, barely | ~7.5 tokens/s |
| IQ4_XS | 4.7 GB | ✕ Won't fit | won't fit |
| Q4_0 | 4.8 GB | ✕ Won't fit | won't fit |
| Q4_K_S | 4.8 GB | ✕ Won't fit | won't fit |
| Q4_K_M | 5 GB | ✕ Won't fit | won't fit |
| Q5_K_M | 5.5 GB | ✕ Won't fit | won't fit |
| Q6_K | 7.1 GB | ✕ Won't fit | won't fit |
| Q8_0 | 8.2 GB | ✕ Won't fit | won't fit |
Get it running in 3 steps
1
Install PocketPal from the App Store — free, no account needed.
2
Download "Gemma 4 E4B Q3_K_M" in the in-app model hub — 4.1 GB, use Wi-Fi. Search Hugging Face for
unsloth/gemma-4-E4B-it-GGUF and pick the Q3_K_M file.3
Set context to 4K and enable Metal — expect ~7.5 tokens/s on this phone.
Related checks
MORE ON IPHONE 17
GEMMA 4 E4B ON OTHER PHONES