# OP Zone vs Sparko

The clearest difference is in-app purchases: OP Zone at none against Sparko's 10. OP Zone also leads on iOS requirement (14.0 vs 17.0). Sparko's advantage is update cadence (every 4 months vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Sparko sells 10 in-app purchases, starting at $1.99 per 7 days. OP Zone asks for nothing beyond the download.

OP Zone ships an update every 10 months, Sparko every 4 months. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OP Zone | Sparko |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sparko-calorie-tracker/id6755430160/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | — | Freemium |
| Size | 97 MB | 70 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Neff](https://appshunter.io/developer/1814836529) | [SPARK AI TEKNOLOJI YAZILIM TICARET VE SANAYI LIMITED SIRKETI](https://appshunter.io/developer/1807149070) |

## What reviewers say

### OP Zone

[App page](https://appshunter.io/ios/app/op-zone/id6746044153)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Sparko

[App page](https://appshunter.io/ios/app/sparko-calorie-tracker/id6755430160)

Effortlessly track your food intake and understand your nutrition with AI-powered analysis. Simply snap a photo of your meal or scan a barcode to get instant calorie and macro breakdowns. Focus on building healthy habits without restrictive diets.

**Highlights:** AI food photo analysis, Barcode scanner, Automatic calorie calculation, Macro and micronutrient breakdowns, Daily calorie goals, Water intake tracking, AI Coach for nutrition advice

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalorieAI+ Weekly | $1.99 | per 7 days |
| CalorieAI+ Weekly | $2.49 | per 7 days |
| CalorieAI+ Monthly Plan | $2.99 | per month |
| CalorieAI+ Monthly | $2.99 | per month |
| CalorieAI+ Monthly | $4.99 | per month |
| CalorieAI+ Monthly Plan | $4.99 | per month |
| CalorieAI+ Monthly | $7.49 | per month |
| CalorieAI+ Yearly Plan | $19.99 | per year |
| CalorieAI+ Yearly Plan | $29.99 | per year |
| CalorieAI+ Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is OP Zone free?

OP Zone is free to download, with no in-app purchases.

### Is Sparko free?

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

### Do OP Zone or Sparko have ads?

Neither OP Zone nor Sparko shows ads.

### Which is updated more often, OP Zone or Sparko?

OP Zone ships an update every 10 months, and Sparko every 4 months. Most recently, OP Zone was updated on October 28, 2026 and Sparko on October 30, 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.*