I spent a week buying every meal from an app that saves food from being wasted. Despite some letdowns, I was impressed.

• The Too Good To Go app aims to help consumers save money and reduce food waste.

• I tried it for a week to see how much I could save.

• I found it was most useful for fresh produce, but the pastries weren't always great.

Everything is expensive right now. It's rare that I ever leave the grocery store having spent less than I wanted to.

I've heard of apps like Too Good To Go, which sell surplus food at a discount, but never gone much further than signing up.

To test it out, I spent a week in early December only buying food from the app. I wanted to see if it was a viable way of saving money, sticking to a budget, and learning to be a bit more flexible with my cooking.

I also want to be more mindful about the groceries I buy and, unfortunately, sometimes waste.

Too Good To Go's CEO, Mette Lykke, told me in a recent interview that the app now operates in 19 countries across North America, Europe, and Australia, and covers 170,000 stores.

Lykke said the company hopes to inspire people "to make that the first step in a journey toward having a more responsible relationship with food."

"If we look at the state of the planet and the climate crisis, then it's pretty clear that something needs to change," Lykke said.

It was fun trying out new places in my city, London. While the pastries I received were hit-and-miss, the fresh produce from local stores was a real highlight.

Monday

Monday was largely spent figuring out the platform. I found that its map feature was the best way to find local cafés and stores.

I saw that an expensive café on my local high street offered pastries, so I opted for that — £3.90 ($4.95) for a blueberry muffin, chocolate chip cookie, and slice of banana bread.

After the sugar rush I was still hungry, so I chose a bag of sandwiches and pastries from my local Costa Coffee for £3.50 ($4.44).

I got a slightly stale pan au raisin and two sandwiches — one seasonal turkey feast, and a BLT which my boyfriend took for lunch the next day.

In total, I spent £7.40 ($9.39) on items worth at least £22.90 ($29.08), so the week was off to a good start.

Tuesday

On Tuesday, I switched things up by trying out fresh produce from a couple of local stores. They offered "surprise bags" of groceries for £4 ($5.08) each.

While I was slightly overwhelmed with what to do with it all, it was an absolute hit with my boyfriend, who is always thrilled to be met with a culinary challenge.

One of the bags had Padron peppers, garlic, tomatoes, mushrooms, radishes, and beets. I also received three packets of pita bread, a sourdough baguette, a fruit bar, some buttermilk, and fresh herbs.

The multivitamin patches were a curveball, which I have to admit I didn't try.

In the other bag, I got a melon, some Greek yogurt, lettuce, butter, rainbow chard, and sausages.

The sausages went in the freezer, but almost everything else was used to make a pasta sauce, roasted peppers, sauteed mushrooms, buttermilk pancakes, and basil oil. The beets got pickled.

The only thing we ended up having to waste was the watercress, which was already looking past its best.

In total, I spent £8 ($10.16) on items worth at least £24 ($30.48).

Wednesday

Tuesday's groceries went further than expected, so I bought another pastry bag to satisfy my snackiness during the day.

I'm not convinced the sourdough loaf and pastel de nata (which I squashed) I got for £4.09 ($5.19) truly had a full sale value of £12 ($15.24), but they were both pretty good.

The server recommended putting the loaf in the freezer and toasting the slices, which was a great tip that lasted me the rest of the week.

Thursday

I knew I was out for dinner with friends on Thursday so I picked up some Starbucks pastries on the way. This was the biggest letdown of the experiment.

Throughout the week, I realized that several cafés don't offer anything until quite late in the day, by which time the food has been sitting out for hours. This makes sense from their perspective, but it does mean that some of the food isn't at its best.

But for £2.50 ($3.18), a muffin, cookie, cinnamon bun, and cheese stick is certainly better than nothing.

In total, I spent £2.50 ($3.18) on items worth at least £7.50 ($9.52).

Friday

I'd been eyeing up a nearby Bangladeshi restaurant all week, so knowing I had a night in alone on Friday, I went for the £4.09 ($5.19) curry bag they were offering.

I got a few bhajis, some chicken and rice, two veggie curries, more rice, some okra, and what I thought was probably cabbage.

It was all good and spicy, though the bhajis were slightly stale.

In total, I spent £4.09 ($5.19) on items worth at least £12 ($15.24).

The results

For the whole week, I spent £26.08 ($33.11) on £78.40 ($99.54) worth of food.

Not every bag felt like amazing value. But some, especially the grocery bags, were genuinely impressive.

The experience taught me a lot about how to be flexible. I'm now committed to focusing less on "use by" dates on food and sticking to the safety assessment Lykke taught me — "look, smell, taste, don't waste" — before throwing things out.

My advice for anyone downloading Too Good To Go is to use it with foresight. The app is great for saving money for those on a strict budget who are OK with some compromises.

Too Good To Go is available in huge stores in the UK (such as Asda) and the US (including Whole Foods), so there are plenty of places to try.

Lykke told me the nice thing about Too Good To Go is you don't have to give anything up, and she's right. From a quick scan of my area, there is bubble tea, ice cream, Turkish food, burgers, doughnuts, and more. You don't get to choose exactly what you want, but as long as you don't mind a bit of a surprise, it's worth a try,

"You actually get good food, it's a good deal, and you do something good," Lykke said. "It's win-win for businesses, for consumers, and for the planet."

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