# Undercurrent vs Tended

The clearest difference is update cadence: Tended at every 4 days against Undercurrent's every 2 weeks. Undercurrent's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Undercurrent sells 1 one-off in-app purchase and Tended sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Undercurrent ships an update every 2 weeks, Tended every 4 days. The most recent releases landed on September 19, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Undercurrent | Tended |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/tended-symptom-tracker/id6760765910/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 69 MB | 41 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Lloyd Rowat](https://appshunter.io/developer/1166734628) | [Geoff Davis](https://appshunter.io/developer/1326616805) |

## What reviewers say

### Undercurrent

[App page](https://appshunter.io/ios/app/undercurrent-symptom-tracker/id6759209174)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Undercurrent Health: Pro | $19.99 | one-time |


### Tended

[App page](https://appshunter.io/ios/app/tended-symptom-tracker/id6760765910)

This health journal helps you track chronic illness symptoms, pain, and daily well-being. Log entries quickly, even on difficult days, and identify potential patterns to better prepare for doctor appointments. It's designed for fluctuating conditions and prioritizes your privacy.

**Highlights:** Log symptoms, pain, energy, mood, and more, Identify patterns and potential triggers, Prepare for doctor appointments with reports, Condition-specific starter sets, On-device AI for descriptions, Privacy-focused with no data collection

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Undercurrent free?

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

### Is Tended free?

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

### Do Undercurrent or Tended have ads?

Neither Undercurrent nor Tended shows ads.

### Which is updated more often, Undercurrent or Tended?

Undercurrent ships an update every 2 weeks, and Tended every 4 days. Most recently, Undercurrent was updated on September 19, 2026 and Tended on September 15, 2026.

---

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