Two clocks can run on a download and they run independently. The first begins when the file finishes arriving. The second is shorter and does not begin until you press play.
The short one is what catches people, because the natural thing to do after downloading a film is to open it for a few seconds to confirm it worked. That starts the timer, and it then runs without stopping, including while the device is off. Take HBO Max, the only one of the big services that publishes both figures. An unwatched download lasts 30 days there. Press play for thirty seconds in the taxi and you have 48 hours, with the file still sitting on the device at full size long after it stops working.
Nothing has gone wrong when that happens. Downloads are not copies. They are encrypted files paired with a licence, and the licence carries conditions the file itself gives no sign of. Netflix sets out its own download rules and the other services each keep a downloads page, though as the table below shows, some of those pages commit to far less than you would expect.
There are two clocks, not one
This is the part that explains nearly every unpleasant surprise.
The storage clock starts when the download completes. It is the outer limit on how long the file stays playable without checking in.
The playback clock is shorter and does not start until you press play for the first time. Once started, it runs continuously, including while the device is off and while you are asleep.
The second timer is the one that catches people, because pressing play to check that a download worked is exactly what starts it.
If you download something to watch later, do not test it by playing it. Check that the download completed instead.
What each service actually publishes
Here is the awkward part. Ask four big services how long a download lasts and only one of them gives you both numbers. One gives you nothing at all.
| Service | Unwatched download expires after | Once you press play | What the service commits to |
|---|---|---|---|
| HBO Max | 30 days, or when the title leaves the service | 48 hours | Both figures, stated plainly |
| Apple TV app | Up to 30 days, and only for Apple TV channels | No figure published | "For most Apple TV channels", hedged twice |
| Netflix | "A certain amount of time" | No figure published, and the page implies none applies | An expiry exists, with no period attached to it |
| Prime Video, included with Prime | Nothing published | Nothing published | The download page covers devices and storage only |
Last verified: 3 August 2026.
A few things follow from that table.
Netflix is the one most often assumed to run a 48 hour rule, and its own expiry page says the opposite. You can watch a download as many times as you like before it expires, so pressing play does not start a shorter clock. Netflix also notes that some titles cap how many times they can be downloaded or renewed at all, set by studio and licence agreements rather than by Netflix, which is part of why no single number gets published. A title that has left the catalogue cannot be renewed or downloaded again.
Apple's 30 days is the most misquoted figure of the set. It is written about Apple TV channels, the paid add-ons sold inside the Apple TV app, rather than about an Apple TV+ subscription, and Apple hedges it twice, with "most" and "up to". There is no published Apple figure for a subscription download, and none at all for a post-play window.
Prime Video is the blank. Amazon's page on downloading titles covers which devices work and where files are saved, and says nothing about expiry.
Where the 48 hour rule actually comes from
The 30 days and 48 hours pairing circulates as a general streaming rule. It is documented, but for paid rentals rather than for anything included in a subscription.
Apple's guide to the Apple TV Store says you have 30 days to begin watching a rented film, and once you start you can play it as many times as you want within 48 hours. Amazon's rental page says rented titles stay in your library for 30 days, and that once you press play you have at minimum 48 hours, with some titles running longer. Note the word minimum, which makes it a floor rather than a fixed window.
Neither figure governs a download that came with your subscription. If you have seen those numbers quoted for Netflix or Prime Video downloads, this is where they came from.
A published default is not a promise about your film
Even the services that do publish a number describe it as a default rather than a guarantee, and each of them names a way it can come up short.
Apple says downloads from a few Apple TV channels might expire earlier than the 30 days it quotes for most of them. HBO Max says an unwatched download expires at 30 days or when the show or film leaves the service, whichever happens first. Netflix says a title's download and renewal allowance can be capped by studio and licence agreements rather than by Netflix.
The common thread is that the conditions come from the licensing agreement behind a specific title, not from a service-wide policy, and the per-title values are not published. That is why two films downloaded from the same app on the same evening can stop working days apart. The figures in the table above are defaults, including the two that look reassuringly precise, so treat them as the best case for a given title rather than a promise about it.
The other limits worth knowing
A per-title download cap. Netflix states that some titles limit how many times they can be downloaded or renewed, because of studio and licence agreements. Deleting and redownloading repeatedly can exhaust that allowance, and the message when it happens is rarely clear about the cause. Netflix's advice at that point is to watch the title online instead.
A limit on how many you can hold at once, counted differently by each service. Netflix counts devices: its Standard with ads plan allows downloads on two at a time. HBO Max counts titles instead, pooled across all your mobile devices, and ties the allowance to your plan: none on Basic with Ads, 30 on Standard, 100 on Premium. HBO Max also caps a single series at 25 downloaded episodes, and films at 30. Reading one service's limit as though it worked like another's is an easy way to be caught short.
Titles that cannot be downloaded at all. Licensing determines this, so a film available to stream may have no download button. There is no setting that changes it.
Renewal needs a connection. Netflix and HBO Max both let you renew an expired download rather than fetch the file again, and HBO Max says you can renew the same download more than once. Either way it requires being online, which is no help mid-flight, the moment it usually matters. Neither will renew a title that has left the catalogue.
What to do before travelling
Download the night before rather than the morning of, so failures surface while you can still fix them. Do not press play to test. Check the storage or downloads screen instead, where a completed download is shown as complete.
If a plan change is coming, check the download rules for the tier you are moving to, because it is one of the things that varies between plans and it is easy to miss in the comparison. We go through the rest in what an ad tier actually costs you.
Finally, if the downloads screen is full of things you never watched, they are also cluttering the row on the home screen, and clearing that out is a separate control on each service. While you are in the settings, the previews that start playing on their own can be switched off in the same visit.
Weekly shows are the common case for downloading before a flight, and the schedules are worth checking against the licence window: Dark Matter runs to the end of October and Slow Horses to the start of December.
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