# UNTETHER vs Sparkline

The clearest difference is review sentiment: UNTETHER at 100% against Sparkline's 0%. UNTETHER also leads on in-app purchases (none vs 1) and iOS requirement (15.1 vs 26.0). Sparkline's advantage is update cadence (every 2 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Sparkline sells 1 one-off in-app purchase. UNTETHER asks for nothing beyond the download.

UNTETHER ships an update every 5 weeks, Sparkline every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | UNTETHER | Sparkline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/sparkline-habit-tracker/id6807189820/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | **Free** | Freemium |
| Size | 28 MB | 4 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Harry West](https://appshunter.io/developer/1860170534) | [Eirik Berntsen](https://appshunter.io/developer/744277889) |

## What reviewers say

### UNTETHER

[App page](https://appshunter.io/ios/app/untether-resist-the-pull/id6757411764)

This app helps you resist the impulse to constantly check your phone. It uses a timer and a 'kill switch' to encourage you to stay present and disconnect from your device. Compete individually or with teams on leaderboards.

**Highlights:** Timer-based phone disconnection, Kill switch for integrity, Syndicates for team competition, Global leaderboards, Ranking system with titles, Offline functionality

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

**In-app purchases:** none


### Sparkline

[App page](https://appshunter.io/ios/app/sparkline-habit-tracker/id6807189820)

This app helps you build lasting habits with a visual progress tracker. It offers flexible scheduling, smart reminders, and integrates with Apple Health and Shortcuts for automated tracking. Archive old habits instead of deleting them to preserve your history.

**Highlights:** Visual habit progress tracking, Flexible scheduling and rest days, Smart reminders tied to routines, Apple Health and Shortcuts integration, Home Screen and Lock Screen widgets, Apple Watch app for logging, Archive habits instead of deleting

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sparkline Pro | $4.99 | one-time |


## Frequently asked questions

### Is UNTETHER free?

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

### Is Sparkline free?

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

### Do UNTETHER or Sparkline have ads?

Neither UNTETHER nor Sparkline shows ads.

### Which is updated more often, UNTETHER or Sparkline?

UNTETHER ships an update every 5 weeks, and Sparkline every 2 days. Most recently, UNTETHER was updated on October 25, 2026 and Sparkline on October 24, 2026.

---

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