# RUN interval vs Tend

The clearest difference is in-app purchases: Tend at none against RUN interval's 2. Tend also leads on update cadence (every 5 days vs every 3 months) and review sentiment (100% vs 77%). RUN interval's advantage is ratings volume (1K vs 1) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. RUN interval sells 2 one-off in-app purchases. Tend asks for nothing beyond the download.

Tend holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: RUN interval has 1K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 77% of RUN interval's written reviews are positive against 100% of Tend's.

RUN interval ships an update every 3 months, Tend every 5 days. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | RUN interval | Tend |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (1K ratings)](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tend-fibromyalgia-tracker/id6801683411/reviews)** |
| Number of ratings | **1K** | 1 |
| Positive reviews | 77.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 34 MB | 122 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [CAN YOU HEAR ME SOFTWARE](https://appshunter.io/developer/711042540) | [Off Script Foundry, Inc.](https://appshunter.io/developer/6801683413) |

## What reviewers say

### RUN interval

[App page](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752)

This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.

**Highlights:** Customizable interval sessions, Time and distance targets, Distance Goal option, Audio and visual feedback, Detailed run summaries, Apple Watch app, Strava sharing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The full RUN interval | $1.99 | one-time |
| The full RUN interval | $3.99 | one-time |


### Tend

[App page](https://appshunter.io/ios/app/tend-fibromyalgia-tracker/id6801683411)

This app helps you track fibromyalgia symptoms like pain, fatigue, and brain fog. It allows you to log your daily feelings, compare your data over time, and prepare summaries for doctor's appointments. Optional features include guided movements and health data integration.

**Highlights:** Track pain, fatigue, brain fog, sleep, and mood, Log flares and use body maps, Compare symptom data with weather and health signals, Prepare printable summaries for appointments, Browse illustrated movement options, Access self-directed relaxation practices, Optional Apple Health integration

**In-app purchases:** none


## Frequently asked questions

### Is RUN interval free?

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

### Is Tend free?

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

### Which has better reviews, RUN interval or Tend?

Tend is rated higher. RUN interval averages 4.7 out of 5 from 1K ratings, while Tend averages 5.0 from 1 ratings.

### Do RUN interval or Tend have ads?

Neither RUN interval nor Tend shows ads.

### Which is updated more often, RUN interval or Tend?

RUN interval ships an update every 3 months, and Tend every 5 days. Most recently, RUN interval was updated on October 15, 2026 and Tend on October 1, 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.*