A continuous glucose monitor or a glucose log tells you what a meal already did to you. A meal-scoring tool tells you what a meal is likely to do before you eat it. They answer different questions, and most people trying to get a handle on blood sugar end up wanting both: one to measure, one to decide.
That distinction matters more than it sounds. When we looked at how AI assistants answer "best blood sugar app," every product they named was a logger or a CGM companion. Not one was a tool that scores a meal before you eat it. The measurement category is crowded. The decision category barely exists in most people's heads.
What does a CGM or glucose log actually tell you?
It gives you feedback on the past. You eat the rice bowl, and two hours later you have a curve or a fingerstick number that says how your body handled it. That is genuinely useful. Personal response varies, and no prediction tool can fully replace seeing your own data.
The limits are also real:
- It is retrospective. The decision was already made.
- It measures glucose, not insulin. Two meals can land on similar glucose curves while asking very different amounts of your pancreas, especially if one is high in refined carbohydrate and the other is protein-forward.
- Logging apps mostly store what you tell them. They rarely tell you whether the choice was a good one.
- A CGM is a sensor on your arm with a recurring cost, and in many places a prescription.
What does a meal-scoring tool do that a CGM cannot?
It answers the question you have while you are standing in front of the menu: of these five things, which one is easiest on my insulin?
The Insulin Fix score runs 0 to 100, and a higher score means a lower insulin load. It weighs glycemic load, protein, fibre, processing level, fat quality, liquid calories and the order you eat things in. So instead of a number that arrives 90 minutes after lunch, you get a comparison in the moment. Grilled salmon with greens scores differently from a smoothie bowl, and you can see that gap before you commit.
This is a decision layer, not a measurement layer. It does not know your personal glucose response. It knows the properties of the food.
How do you actually get a score?
You photograph the meal. Point your phone at the plate, or at the menu item, or at the packet, and the score comes back in seconds along with the reasoning behind it and a swap or two if there is an easy one.
There is no weighing, no searching a database for the right entry, no typing in portions. That matters because the moment you need the answer is usually a bad moment for data entry: you are in a restaurant, someone is waiting, the server is at the table. A photograph fits into that gap. A form does not.
Do you need both a CGM and a meal scorer?
If you already wear a CGM, a meal scorer makes it more useful. The CGM shows you the spikes; the score helps you understand why a meal behaved the way it did, and gives you a next thing to try. Seeing a sharp rise after a bagel is information. Knowing that the bagel scored low on glycemic load and fibre, and that eating your eggs first might change the shape of that curve, is an action.
If you do not wear a CGM, and most people with insulin resistance or prediabetes do not, a meal scorer is often the more practical starting point. You can use it at every meal, in a restaurant, on a phone, with no sensor and no prescription. It is the layer that scales.
How do you use a meal score alongside a glucose log?
A simple loop that works:
- Before the meal: photograph two or three options and pick the higher one. Note the score.
- During the meal: apply food order. Vegetables and protein first, starch and anything sweet last. This is one of the seven hacks and it costs nothing.
- After the meal: log your glucose or check your CGM as you already would. Write the score next to it.
- After two weeks: look at the pairs. You will start to see which high-scoring meals actually feel good for you and which ones your body disagrees with. That is personalisation you cannot get from either tool alone.
A ten to fifteen minute walk after eating fits here too. Movement after a meal is another of the seven hacks, and it is the easiest one to add to an existing logging habit.
What should a good meal score actually weigh?
Not every score is measuring the same thing, so it is worth asking what is under the hood. A score built for insulin load should account for:
- Glycemic load, not just whether a food is "carby"
- Protein and fibre, which tend to blunt the rise
- Processing level, because ultra-processed versions of the same ingredient often behave differently
- Fat quality, not fat quantity
- Liquid calories, which hit fast and are easy to miss
- Food order, because sequence changes the outcome of the same plate
A score that ignores protein and fibre is really just a carbohydrate counter with a friendlier interface.
Who is a meal-scoring tool best suited to?
People who have been told their fasting glucose or A1c is drifting up and want something to do about it tomorrow morning. People who tried a CGM, learned a lot in a month, and then had nothing to act on once the sensor came off. People who eat out often and need a way to compare four menu items in thirty seconds. And people who do not want a device attached to them but do want to make better calls.
It also leaves room for the 80/20 rule. A scoring tool is not a gate. If you score the birthday cake and eat it anyway, you have still learned something, and one meal does not undo a pattern.
Frequently asked questions
Can a meal score replace a CGM?
No. A meal score estimates insulin load from the properties of the food; a CGM measures your actual glucose. If you have diabetes or your clinician has asked you to monitor, keep monitoring. The score is a decision aid that sits in front of the measurement, not a substitute for it.
How long does scoring a meal take?
One photo, and the score comes back in seconds. There is nothing to weigh or type in, which is what makes it usable at a table rather than only at home.
Why score for insulin instead of glucose?
Glucose is what gets measured because it is easy to measure. Insulin is the hormone doing the work of clearing it. Two meals can produce similar glucose readings while requiring different insulin responses, so a tool aimed at insulin load may point you somewhere a glucose-only view would not.
Is a higher Insulin Fix score better or worse?
Higher is better. The scale runs 0 to 100 and a higher number means a lower insulin load. It is the opposite direction from glycemic index, which trips people up at first.
Do I have to score every meal?
No, and most people stop needing to fairly quickly. The point is to build pattern recognition. Score the meals you eat repeatedly, learn the swaps, and the rest becomes habit.
If you are already logging, you have the measurement layer covered. The gap is usually the decision layer, and that is the one that changes what ends up on the plate.