Health and appearance

An iPhone app for makeup. The user uploads a selfie without makeup and a photo of a makeup look, for example from TikTok or Instagram. The app's AI applies that look to the user's own face, then gives a step-by-step routine and a list of products to buy. It is free to download and paid for with subscriptions through the App Store.

Its result is a before-and-after picture of the user's own face, which a short video shows in seconds. The founder chose TikTok as the channel before he built the app, then tripled revenue from almost the same installs by moving and testing the paywall with Adapty.

An iPhone and Android app that estimates calories, macronutrients and micronutrients from a photo of a meal, with a barcode scanner for packaged food and a log of weight and BMI. It is free to download; the service needs a subscription after a 3-day free trial, at US$9.99 a month or US$49.99 a year in the US store.

One founder released it in August 2025, after Cal AI, released in April 2024, had shown that photo calorie counting sells. It has a hard paywall, a short trial and cheap yearly plans. It appears to have started in France: the French App Store shows 598 ratings against 138 in the US store. The owner lists TikTok as the only marketing channel.

An iPhone app that coaches boxing. The user uploads a video of shadowboxing, bag work or sparring, and the AI scores the technique in seven areas (stance and balance, guard, footwork, punch selection, combinations, head movement, range control) with corrections and drills. It also has an AI chat coach, training programs, a punch callout mode with audio cues, a round timer, AI food logging from a photo, a barcode or voice, and a weight-cut mode. Every feature needs a subscription.

It moved the structure of the founder's first app, Wrestle AI, to boxing, a sport that people can train alone: an AI breakdown of a training video, a calorie tracker and a weight-cut mode, all behind a subscription at the same prices. Users came from Meta ads and influencers, according to the founder's TrustMRR profile, with a self-reported marketing spend of US$10,000 a month.

You photograph a meal. TrackAI returns the dishes it recognises, an estimated weight, the calories, and the protein, fat and carbohydrates. You can correct an ingredient or a weight, and the totals update. The app also shows daily and weekly statistics, sends meal reminders and gives rewards for days in a row.

It built a product that already sold well in English for Ukraine and Central and Eastern Europe: Ukrainian language, local dishes and lower local prices. The model that reads the photo is rented and the billing is a ready-made service. The only growth channel the founder names is paid advertising on Meta.

An iPhone app for sprint training. You film a sprint, and the AI splits it into phases (reaction, drive, acceleration, top-end, speed and finish) and says what to fix. It also has an AI coach, adaptive sprint plans, a daily readiness check, strength workouts, a "Sprint Age" fitness score and calorie logging from meal photos. Every feature needs a subscription. It started as a track-and-field app and in August 2026 added a path for everyday people who want to get fit.

Two college track athletes already had about 150,000 Instagram followers who asked them every day for a training plan. They built that plan into an app without writing code, promoted it inside their own race videos, and priced it for teenagers.

You photograph your meal. Cal AI sends the picture to a rented AI model and returns an estimate of the calories, protein, carbohydrates and fat. No search, no portion menus.

It sold speed to people who gave up on manual food logging, it paid 250 influencers fixed monthly fees to reach them, and it had a 30-dollar-a-year price. The rented model made the hard part cost almost nothing to build.

A phone app that scores a selfie. The user uploads a photo of his face, and the app returns a score up to 100 with ratings of the jawline, the cheekbones, the skin and masculinity, and tips such as starting a skin care routine. The results are shown after the user subscribes, at about US$4 a week, or invites three friends.

Young men were already posting photos online and asking strangers to rate their looks. Umax turned that habit into a private score from an AI model. One founder built it at almost no cost on a rented vision model, and creators in one small niche spread it, because a score makes a before-and-after video easy to show. Revenue was highest within months of the launch and has fallen since.

An iPhone app for wrestlers. Upload a clip of a practice or a match and the AI returns a score, strengths and weaknesses, drills and strategy notes. It also has drill plans, a technique library, a match tracker, a calorie tracker and a weight-cut mode, and in April 2026 it added Brazilian jiu-jitsu, freestyle and Greco-Roman wrestling. Every feature needs a subscription.

The founder had wrestled in school and knew that wrestlers rarely have an expert to review their film, and in 2025 the App Store had no app like it. The video breakdown can be shown in under 10 seconds, so creators could sell the app in posts that look like training videos, not ads. A no-code builder kept the total spending at about US$1,100.