Frame rate

30fps vs 60fps vs 120fps on iPhone: What to Shoot — and What If You Already Shot 30

Your iPhone can record at several frame rates, and the Camera app makes switching easy. But should you record in 30fps or 60fps? This guide explains what frame rate actually changes, where you’ll see the difference and where you won’t, and what to pick for everyday clips, sports, and social media. It also covers what you can still do with videos you already shot at 30fps.

Published October 18, 202610 min read

What frame rate actually changes

Frame rate is how many still pictures the camera captures each second. At 30fps, each picture stays on screen for about 33 milliseconds before the next one replaces it. At 60fps, that drops to about 17 milliseconds. The camera records the moment twice as often, so moving things travel a shorter distance between pictures, and motion looks more continuous.

Two common mix-ups are worth clearing up. Frame rate is not resolution. 4K or 1080p describes how many pixels each picture has, while fps describes how many pictures there are. A 1080p 60fps video is not sharper than a 1080p 30fps one, and neither is better quality than the other in general. And higher fps is not always better. It’s a choice about how motion looks, with real costs in storage and light.

Is 30fps to 60fps noticeable? Where you’ll see it, and where you won’t

The difference depends on how much moves between frames.

• Very visible: camera pans, walking shots, sports, running kids and pets, cars, scrolling text, and anything filmed from a moving vehicle. At 30fps, these can look like they move in small jumps. At 60fps, the motion connects.
• Hard to see: tripod shots, people talking to the camera, slow landscapes, and food and product clips. Little moves between frames, so doubling the frames changes little.
• Depends on the screen: a display can only show as many distinct frames as its refresh rate allows. On a 60Hz screen, 60fps and 120fps look the same. The difference from 120fps only appears on a 120Hz display.

The easiest test is your own: record the same pan at 30fps and at 60fps, then watch them back to back on the phone you’ll actually view them on.

The trade-offs: storage, low light, and the look

Storage

Apple’s own guide says it plainly: “Faster frame rates and higher resolutions result in larger video files” (Apple). A 60fps clip stores twice as many pictures. Modern compression means the file isn’t necessarily exactly twice as big, but expect it to be noticeably larger. If you record long clips or your iPhone is nearly full, 30fps is the practical choice.

Low light

At 60fps, each frame can be exposed for at most 1/60 of a second, half the time available at 30fps. In bright daylight that doesn’t matter. Indoors at night, it means less light per frame and more noise. Apple’s Auto FPS setting exists for this reason: iPhone “can improve the video quality in low-light situations by automatically reducing the frame rate to 24 fps.” Depending on your model, you can apply it to 30fps video only, to both 30fps and 60fps, or turn it off (Apple). So if a “60fps” clip from a dark room looks less smooth than you expected, check that setting.

The look

24fps is the traditional frame rate of film, and a lot of people associate its slight motion blur with a “cinematic” feel. 60fps looks crisp and immediate, which suits sports, gaming, and action, but can feel too real for storytelling. Neither is wrong. Pick the one that matches the mood you want.

What fps should you record in? By situation

If you’re unsure, a reasonable rule is: 30fps by default, 60fps whenever something fast is happening. And if the moment is one you’ll want to replay slowly, like a dive, a trick shot, or a golf swing, use Slo-mo mode. Generating frames later is possible, but frames you actually recorded are always more accurate than frames estimated afterward.

30fps or 60fps for TikTok, Instagram, and YouTube

Here is what the platforms themselves document, as of October 2026:

• YouTube: “Content should be encoded and uploaded in the same frame rate it was recorded.” YouTube lists 24, 25, 30, 48, 50, and 60fps as common frame rates, with other frame rates also acceptable, and recommends higher bitrates for 48 to 60fps uploads (YouTube Help).
• TikTok: its developer documentation for posting through the API lists a minimum of 23fps and a maximum of 60fps (TikTok for Developers).
• Instagram: Meta’s developer documentation for publishing Reels through the API lists “Frame rate: 23-60 FPS” (Meta for Developers).

TikTok and Instagram don’t publish in-app upload specs in the same detail. Their API limits are still a strong hint: 60fps is the safe ceiling for social video, and a 120fps file isn’t likely to stay 120fps after upload. Within that ceiling, the choice is the same as anywhere else. Use 60fps for fast action and 30fps for talking, vlogs, and slow scenes.

In practice, YouTube’s advice means: don’t change the frame rate just to hit a number. If you’ve interpolated a clip to 60fps because you want smoother motion, upload that 60fps file as it is, without converting it again. 60 is one of the frame rates YouTube lists.

60fps vs 120fps

120fps is almost always about slow motion. According to Apple’s iPhone User Guide for iOS 27:

• Slo-mo mode records 1080p at 240fps on the back camera and 120fps on the front camera by default. On supported models, Settings → Camera → Record Slo-mo also offers 4K at 120fps.
• On iPhone 16 Pro, iPhone 17 Pro and iPhone 18 Pro models, and iPhone Duo, you can record slow-motion video right in Video mode by selecting 120 FPS (Apple).

Choose 120fps when you plan to slow the clip down: 120fps played at a quarter of the speed still gives you 30 real frames every second. For normal-speed viewing, 120fps only looks different on a 120Hz screen, it makes bigger files, and social platforms document 60fps as their maximum. For most people, the useful lineup is 30fps for everyday clips, 60fps for action, and Slo-mo or 120fps for the moments you’ll replay slowly.

How to change the frame rate on iPhone

Apple’s steps, from the iPhone User Guide (Apple):

Menu names can differ slightly on older iOS versions and models, but the path through Settings → Camera has stayed the same.

Already shot in 30fps? Your options

Most iPhone videos end up at 30fps. Here’s what you can still do with one.

Make it 60fps with frame interpolation

An interpolation app estimates the motion between each pair of frames and generates a new frame in the gap, so a 30fps clip really becomes 60fps. Be careful with converters that only duplicate frames. They produce a file labeled 60fps that moves exactly like the original. Our step-by-step guide covers how to convert 30fps to 60fps on iPhone and how to check the result. Not sure what you shot? Here’s how to check a video’s frame rate on iPhone.

Turn it into smooth slow motion

The Photos app can’t slow down a 30fps video. Apple’s condition is that the video was “captured at a frame rate higher than 30FPS” (Apple Support), so a 30fps clip gets no speed option. See why you can’t slow down some videos in Photos for details. iMovie can slow any clip, but without new frames a 30fps clip at half speed shows only 15 distinct frames per second, which looks choppy.

Interpolation fixes this by generating the missing frames. In FrameFlo (my app), Slow Motion stretches a clip 2× or 4× while the output stays at the original frame rate, so a 30fps clip remains 30fps at twice the length. You can create and preview slow motion for free; saving it requires Pro, a one-time purchase. One thing to know: the original audio plays at normal speed from the start, so it won’t line up with the slowed video and goes silent after the original length. The full walkthrough is in how to make a normal video slow motion after recording.

Or leave it

If the clip is a conversation, a slow scene, or something you want to feel cinematic, 30fps is already the right frame rate. Interpolation helps motion. It doesn’t improve sharpness, noise, or color, and it can’t recover detail that motion blur smeared out. For precise analysis, such as checking a golf swing position by position, generated frames are estimates, so next time record that kind of moment in Slo-mo.

FAQ

Written by punimaru, the developer of FrameFlo. App details are based on how the app is actually built. Since this is my own app, I’ve also noted where it isn’t the right tool and what else you can use.