No signal in the cellar: what ‘works offline’ actually means in a stocktaking app

"Works offline" is on every stocktaking app's feature list, and it means three different things depending on who wrote it. The question that matters in a cellar isn't whether you can tap in a number with no signal. It's whether you need signal to start the count, finish it, or move from the cellar to the bar. Ask that before you pay anyone, including me.

Cellars are the worst place in the building for a phone. They're underground with thick walls, and the cold room is basically a metal box. Plenty of pubs have Wi-Fi that dies halfway down the cellar steps. If your stocktake starts with the kegs, which most do, the first thing your app meets is no signal at all.

What the vendors actually say

I went to the help pages rather than the sales pages, because the help pages are where the small print lives. Two of the better-known bar inventory apps are clear about it, which is to their credit.

App	Counting with no signal	What still needs a connection
Backbar	Keep counting, counts saved when a connection comes back	Starting, ending or resuming an inventory session, and switching storage location to count a new area
WISK	Scan, count, create new items and even submit the inventory offline	Starting the count. Back out of it while offline and you can't get back in until you're online. Most other actions
StockTap	Readings and count lines save to the phone straight away and queue for sync. A banner shows you're offline and how many changes are waiting	Getting into the app the first time on that phone, and signing in

Read the Backbar line again with a pub in mind. Cellar first, then up to the bar. If moving from one storage location to the next needs signal, you're walking back up the stairs to switch areas, and if you finish the count in the cellar you can't close it there either. Workable, but you want to know before the first stocktake night, not during it.

WISK's catch is the one that would get me: leave the count while you're offline, by accident or because the phone rang, and you're locked out of it until you find signal. Their page also points out that nobody else in the venue sees your counts until your phone syncs, which matters the minute two people are counting.

How StockTap handles it, and what I can't promise

StockTap was built for cellars, so it saves to the phone first and the cloud second. Every reading, count line and spot check goes into the phone's own storage the moment you tap it, then syncs when signal comes back. While you're offline a bar across the top says so, and counts the changes waiting. You can watch that number drop to nothing when you get back upstairs, which is the reassurance you actually want.

What I won't claim is that it does anything with no signal ever. It runs in the phone's browser and installs to the home screen, so the very first time you open it on a phone, and any time you sign in, it needs a connection like anything else. What I'd tell anyone with any app: open it upstairs, open the count, then go down.

The five-minute test before you buy

Do this during any free trial, at the bar, before you trust it with a real stocktake:

1. Open the app and start a count with signal. Count two lines normally.
2. Switch the phone to airplane mode. Wi-Fi off too.
3. Count five more lines, then try to move to a different area or location. Note whether it lets you.
4. Close the app completely and reopen it, still in airplane mode. This is the one that catches people out. Are your five lines still there, and can you carry on?
5. Turn signal back on and check the counts arrived. Look from a second device or the web dashboard, not the same phone.

If any step fails, that isn't necessarily a dealbreaker. You just now know where you'll be standing when it matters. Put it on your buyer's checklist next to price and exit terms.

Two counters, one with no signal

Offline gets more complicated when two people count. If you're in the cellar with no signal and someone else is counting the back bar online, your numbers and theirs only meet when you sync. Most apps handle that fine if you never count the same product twice. The trouble starts when you both count the same shelf.

The fix is boring and it works: split the building by person before you start. Cellar is one person, bar is the other, and nobody crosses over. It's the same one-method-per-product discipline as training staff to count, applied to areas.

Why a lost count costs more than it looks

A count that vanishes doesn't just cost the recount. Two people for two hours at the £12.71 National Living Wage is £50.84 before anyone's tired or grumpy about it, and if the recount happens the next day you've got a day's trading in between that has to be untangled. Worse, a recount done in a hurry is a worse count, and a bad count gives you a variance that sends you chasing a loss that isn't there.

Which is why I'd still keep a printed sheet in the cellar. If the battery gives up in the cold or the app does something daft, write the numbers down and type them in upstairs. The free stocktake template prints fine for exactly that. Any app that makes you feel silly for having a paper backup is selling something.

Common questions

Do stocktaking apps work without internet?

Most let you enter counts with no signal, but they differ on what else needs a connection. Backbar needs one to start, end or resume a session and to switch storage location. WISK needs one to start the count and to get back in if you leave it offline. StockTap saves every reading to the phone and syncs later, but needs a connection the first time you open it on a phone and to sign in.

What happens to my counts if the phone loses signal in the cellar?

In an offline-first app they're saved on the phone and sent when signal returns. Before relying on that, close and reopen the app in airplane mode during a trial and check the counts are still there.

Can two people count at the same time if one has no signal?

Usually, as long as you never count the same product twice. Split the building by person, cellar to one and bar to the other, so the two sets of counts can't clash when they sync.

Should I still keep a paper count sheet?

Yes. Phones die in cold cellars. A printed sheet costs nothing and means a flat battery never costs you the count.