# Power Stretching vs Calvi AI

The clearest difference is in-app purchases: Power Stretching at none against Calvi AI's 2. Power Stretching also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Calvi AI's advantage is update cadence (every 2 days vs every 4 days). On price and device support there is nothing between them.

Both are free to download. Calvi AI sells 2 in-app purchases, starting at $9.99 per month. Power Stretching asks for nothing beyond the download.

Power Stretching ships an update every 4 days, Calvi AI every 2 days. The most recent releases landed on October 28, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Power Stretching | Calvi AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calvi-ai-calorie-tracker/id6804675201/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 53 MB | 71 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [LUCKYSOFT OU](https://appshunter.io/developer/1242118176) | [Mykhailo Nahreba](https://appshunter.io/developer/1879288243) |

## What reviewers say

### Power Stretching

[App page](https://appshunter.io/ios/app/power-stretching/id6764091175)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Calvi AI

[App page](https://appshunter.io/ios/app/calvi-ai-calorie-tracker/id6804675201)

Log your food intake effortlessly using natural language or photo analysis. This AI-powered diary tracks calories, macros, water, workouts, and more, offering personalized insights and reminders. Upgrade for unlimited AI features and detailed weekly reviews.

**Highlights:** AI-powered calorie and macro logging, Natural language food entry, Photo analysis of meals, Personalized daily calorie goals, Workout calorie tracking, Medication reminders, Allergen tracking

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calvi Pro Monthly | $9.99 | per month |
| Calvi Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Power Stretching free?

Power Stretching is free to download, with no in-app purchases.

### Is Calvi AI free?

Calvi AI is free to download, with in-app purchases available.

### Do Power Stretching or Calvi AI have ads?

Calvi AI shows ads; Power Stretching does not.

### Which is updated more often, Power Stretching or Calvi AI?

Power Stretching ships an update every 4 days, and Calvi AI every 2 days. Most recently, Power Stretching was updated on October 28, 2026 and Calvi AI on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*