PumpStash vs Pumply

Both apps log your pumping sessions. Both track a freezer stash. So the useful question is not which one has more features. It is what happens in between: whether the session you just logged turns into a dated bag in your freezer, and how much of that you get without paying.

PumpStash connects the two halves, so what you pump becomes what you have, and what you have becomes how many days you are ahead. Pumply is an established pumping log with years in market and a focus on staying simple.

Side by side

About this table. Feature details come from each app’s Google Play listing. Which Pumply features sit behind their paid upgrade was checked in the app in September 2026. “Not mentioned in their listing” means exactly that: their listing does not say, not that the app cannot do it.

One app, both halves of the job

Most pumping apps are good at one of two things. Some are built around the session: how long, which side, how many ounces, how the week is trending. Others are built around the freezer: what is in there, how old it is, what to use next.

PumpStash treats those as one job, because in practice they are.

When you log 4.5 oz into the deep freezer, that is not just a number in a chart. It becomes a bag with a date on it. That bag joins your milk stash. Your stash divided by what your baby drinks in a day becomes your days of milk left. One entry, three jobs, no second app and no spreadsheet to keep in step.

The number moves on its own, too. As your baby grows and drinks more, the days-of-milk-left figure comes down to match, without you editing anything.

That is the practical difference. Not a longer feature list, but fewer places for your milk to be recorded and fewer chances for those places to disagree.

What happens to a bag after you log it

This is where a stash tracker earns its keep, because milk has a clock on it and the clock changes depending on where the milk is sitting.

Every entry in PumpStash carries its own expiry date, worked out from CDC storage guidance and the place you put it: about four days in the fridge, six months in a combo freezer, twelve in a deep freezer.

Move a bag and the date follows. Take milk out of the deep freezer on a Tuesday morning to thaw, and PumpStash does three things: it recalculates the expiry against the fridge window, it starts a 24 hour thaw clock, and it stops you putting that bag back in the freezer, with a note explaining why milk should not be refrozen once thawed.

Your stash lists oldest first, so the bag you should reach for is the one at the top. Swipe to mark it used when the bottle is empty. On a daycare morning, one tap marks the whole day’s pack as gone.

None of this requires you to remember anything, which is the point. You wrote the date on the bag in Sharpie once. After that it is the app’s problem.

Knowing when you’ll run out

The days-of-milk-left number is only as good as the intake figure underneath it, so here is exactly how PumpStash works that out.

It starts from your baby’s age and weight, using standard pediatric intake tables. That gives a reasonable figure from day one, without you logging a single feed.

Because babies do not follow tables, PumpStash checks in every two weeks. The check-in arrives pre-filled with the current estimate. If it looks right, that is one tap. If your baby is drinking more, change the number and the projection updates. You can also set the figure yourself at any time in settings and leave it there.

That is the whole mechanism. No per-feed logging, no guesswork about where the number came from. If you want to try the sum before you install anything, the free breast milk stash calculator does it in the browser.

Where Pumply is stronger

Pumply has been in market for years, and that shows in the part they have spent the longest on. Their session analytics run deep: trends, totals, averages, and insights across your whole pumping history, refined over multiple versions.

Their listing also leads on keeping tracking simple, and simplicity is a genuine feature, not a gap. An app that does one thing without asking much of you is worth a lot at 3am. If the pumping log itself is what you want, and the freezer is something you would rather handle with a marker pen and a mental note, Pumply is doing exactly what it set out to do and PumpStash would be more app than you need.

Your data

PumpStash keeps everything on your phone. No account, no sign-up, no server. Nothing leaves the device unless you switch on Plus backup, and if you do, it copies to your own Google account so you can restore it on a new phone. There are no ads, so there is nothing to profile you for. Turn off the wifi and the app works exactly the same.

For comparison, Google’s Data safety page for Pumply lists Health info among the data that may be shared with third parties for analytics, and states that the developer does not provide a way to request your data be deleted. Their listing also notes the app contains ads. Both entries are linked below so you can read them yourself.

Worth knowing either way: Data safety entries are written by the developer, not audited by Google. That holds for every app on the store, ours included.

What you get without paying

Pumply is free to download. Their Play listing states the app contains ads and offers in-app purchases from $5.99 to $24.99 per item. Checking the app in September 2026, pumping reminders, the countdown and data export sat behind that paid upgrade.

In PumpStash, all of the following is free, with no time limit and no log cap:

• Unlimited session logging
• Pumping reminders
• Your full stash inventory, with every bag’s expiry date
• Days of milk left, updated live
• Data export
• No ads

Plus is optional and adds expiry reminders, cloud backup, custom storage locations and longer-range insights. You can pay monthly, yearly, or once for your whole pumping journey. Cancel and the free logging carries on exactly as before.

So which one

If you want a well-worn pumping log and deep session trends, and you are content to track your freezer separately, Pumply does that job and has been doing it for a long time.

If the freezer is the part that keeps you up, if you want every bag dated and ordered without thinking about it, and you want to see how many days you are ahead without doing the arithmetic yourself, that is what PumpStash was built for. It logs your sessions too, and it does all of that free.

If the question on your mind is when you can stop pumping altogether, that one has its own calculator.