# TESLA Ring vs Histeva

The clearest difference is in-app purchases: TESLA Ring at none against Histeva's 2. TESLA Ring also leads on iOS requirement (12.0 vs 16.4). Histeva's advantage is update cadence (daily vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Histeva sells 2 in-app purchases, starting at $5.99 per month. TESLA Ring asks for nothing beyond the download.

TESLA Ring ships an update monthly, Histeva daily. The most recent releases landed on October 10, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | TESLA Ring | Histeva |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Size | 96 MB | 67 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [INTER-SAT LIMITED](https://appshunter.io/developer/1548262981) | [MeguMethod s.r.o.](https://appshunter.io/developer/889708670) |

## What reviewers say

### TESLA Ring

[App page](https://appshunter.io/ios/app/tesla-ring/id6502275906)

**Features:** macOS Compatibility

**In-app purchases:** none


### Histeva

[App page](https://appshunter.io/ios/app/histeva-histamine-diary/id6808139682)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $5.99 | per month |
| Premium - Yearly | $49.99 | per year |


## Frequently asked questions

### Is TESLA Ring free?

TESLA Ring is free to download, with no in-app purchases.

### Is Histeva free?

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

### Do TESLA Ring or Histeva have ads?

Neither TESLA Ring nor Histeva shows ads.

### Which is updated more often, TESLA Ring or Histeva?

TESLA Ring ships an update monthly, and Histeva daily. Most recently, TESLA Ring was updated on October 10, 2026 and Histeva on October 29, 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.*