No, tart and sour are not the same thing, though they start in the same place. Both sensations begin with acid hitting the sour receptors on your tongue. The difference is balance. When acidity arrives with enough fruit flavor and sweetness around it, your brain reads the result as tart: bright, mouthwatering, the thing that makes you want another sip. When acidity runs unopposed, you read it as sour, and you wince. Nothing changes chemically between the two, the same acid can produce either, depending on what else is in the glass. In soda specifically, sugar is the variable that decides which one you taste. A typical cola carries about 45 grams of sugar per 12oz can, enough to bury almost any acidity. Cut the sugar and the acidity comes through as tartness instead. Sour is a warning. Tart is an invitation.
Sour vs. tart: the difference in one line
Same acid, different balance. Tart is acidity with enough sweetness and flavor around it to read as bright and refreshing. Sour is acidity on its own, sharp enough to make you pucker.
The acids that do the work
Different acids land differently on the palate. This is why a lemon soda and a cherry soda can sit at the same pH and still feel nothing alike.
| Acid | Found in | How it reads |
|---|---|---|
| Citric | Lemons, limes, berries | Sharp and fast, hits early and fades quickly |
| Malic | Apples, cherries, apricots | A longer arc, builds mid-sip and lingers, like biting a green apple |
| Tartaric | Grapes | Dry, firm, a little austere |
| Lactic | Dairy and many everyday foods | Soft and rounded, almost creamy |
Reckon lists lactic acid and ascorbic acid on the can, which is why its tartness stretches across the whole sip instead of spiking and vanishing. Lactic is the rounder of the two, so the effect is closer to a squeeze of citrus in a glass of fruit than to a sour candy. (Curious how tart cherry differs from the candy-red stuff? We compared tart cherry, black cherry, and cherry cola.)
Why sugar changes how tart tastes
Sugar doesn't remove acid. It just talks over it.
A typical cola carries about 45 grams of sugar per 12oz can, enough to bury nearly any acidity. Reckon Cherry has 15 grams and Apricot has 12, about 1/3 the sugar of a typical cola, so the acids get to speak at normal volume. We didn't add extra pucker. We turned down the noise.
The sweetener itself matters too. Reckon is sweetened with invert sugar, which reads rounder and cleaner than heavy syrups, so the tartness stays bright without turning harsh.
Where Reckon sits on the tart scale
Reckon is a tart craft soda made from an old-world recipe and brightened with tart cherry and apricot flavor. Cherry (90 calories) is the deep end, dark fruit with a firm tart spine. Apricot (80 calories) is sun-ripe and gentler, tart at the edges. Both are caffeine-free and colored with carrots, black for the Cherry and orange for the Apricot, and both finish dry. If you want the full category tour, start with what tart craft soda is, or see the full fact sheet. In Cleveland, you can find Reckon at these shops.
Not too sweet. On purpose.
Frequently asked questions
Is tart the same as sour?
No. Both come from acidity, but tart means the acid is balanced by sweetness and fruit flavor; sour means the acid dominates. A tart soda is bright and refreshing. A sour one makes you wince.
What makes Reckon taste tart?
Two things working together. The can lists lactic acid and ascorbic acid, which supply the acidity, and lactic in particular reads rounder and longer than a sharp acid like citric, so the tartness stretches across the sip rather than spiking at the front. The second half is restraint: Cherry has 15g of invert sugar per 12oz can and Apricot has 12g, about 1/3 the sugar of a typical cola's roughly 45g. Sugar does not remove acid, it just talks over it, so cutting the sugar is what lets the acidity come through as a clean tartness instead of being buried. That combination is why Reckon finishes dry and makes you want another sip, rather than coating your tongue the way a sweeter soda does.