LightFasting vs Food_Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LightFasting
This app offers a scientific approach to weight loss by guiding users through a slightly high-intensity diet. It includes tools for calorie conversion, calculating ideal weight, basal metabolic rate, and BMI, along with tracking weight changes and energy intake.
- High-intensity diet guidance
- Calorie and Joule conversion
- Standard weight calculator
- Basal metabolic rate calculator
- Body mass index calculator
- Energy intake tracking
- Weight change tracking
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If you can't stick to the exercise, what if you can't see the effect of dieting? Use the "Light Diet" App to help you lose weight faster and more scientifically. -- Traditional dieting specifies the length of time by timer, but it is not only inefficient, but also needs to keep an eye on the time. It is easy for people to give up halfway because of too much trouble. Light dieting is different. Light dieting on a daily basis can effectively reduce the weight of people with excessive daily energy intake through a slightly high-intensity diet. Believe that as long as you persist, you will be able to get rid of the harm of overweight! The product also includes the following extension tools: Calorie Joule conversion (the energy on the bottle bag can finally be easily converted) Standard weight calculator Basal metabolic rate calculator Body mass index calculator Energy intake record Weight change record
Food_Diary
This app provides a visual food diary on a calendar, allowing you to see all your meals at a glance. It uses AI to generate meal images and estimate nutrition even if you forget to take a photo, and helps make sense of your health data by comparing it to averages.
- Visual meal diary on a calendar
- AI-generated meal images
- Estimated nutrition for meals
- Health data comparison to averages
- AI prompt for data breakdown
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See every meal at a glance. A visual food diary on your calendar. THE PROBLEM You want to track what you eat, but you forget to record meals or miss taking a photo. And even when you do track your health, Apple Health gives you numbers without context — no baseline, no averages, no way to know what they actually mean. WHY EXISTING SOLUTIONS FAIL Most food trackers show you lists and numbers — not a visual picture of what you ate. If you missed taking a photo, there's no way to add one after the fact. And none of them help you make sense of your health data. THE SOLUTION FoodDiary lays out your entire month of eating — breakfast, lunch, and dinner — on a familiar calendar. Forgot to take a photo? Apple Intelligence generates an image of your meal and estimates its nutrition — even days later. Your health data, made meaningful. See how your numbers compare against averages for men and women, and copy a ready-made prompt into any AI for a plain-language breakdown of what it all means. Free use includes banner ads. Remove ads permanently with a one-time purchase. No subscription.
Screenshots
Verdict
The clearest difference is review sentiment: LightFasting at 83% against Food_Diary's 0%. LightFasting also leads on ads (none vs shown) and device support (4 vs 2). Food_Diary's advantage is price (Free vs $0.99) and update cadence (fortnightly vs every 2 months). On in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Food_Diary is free to download; LightFasting costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LightFasting ships an update every 2 months, Food_Diary fortnightly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.
| Parameter | LightFasting | Food_Diary |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 83.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 44 MB | 72 MB |
| Age rating | 12+ | 4+ |
| Developer | 兴龙 张 | Seung-Un Ham |
Customer experience
LightFasting
Food_Diary
In-app purchases
LightFasting
No in-app purchases
Food_Diary
No in-app purchases









