Verdict
Reviewers consistently call this unit converter simple and reliable, with no complaints about ads or clutter. It's a narrow, single-purpose tool that seems to have reached a finished state rather than one still being iterated on.
Best for
Someone who needs a fast, no-frills unit converter on iPhone and doesn't care whether it ever gets new features again.
Dealbreaker
Not written yet.
The facts.
Pulled from the App Store, not written by hand.
Price
$19.99 once
In-app purchases
Unknown
Ads
Unknown
Platforms
iPhone, iPad
Rating
4.9★ (8,414)
Version
3.6
Last updated
Nov 19, 2018
Released
Jan 18, 2013
Attributes
Native appOne-time purchaseNo subscription
Category
Utilities, Productivity
What reviews consistently say.
Themes grouped from 200 App Store reviews. Source feed ›
Praised for
Ease of use and design37 reviews
Value for money3 reviews
Blocks ads effectively2 reviews
Where this comes from
37 of 200 recent reviews raised: Ease of use and designApp Store reviews ›
3 of 200 recent reviews raised: Value for moneyApp Store reviews ›
2 of 200 recent reviews raised: Blocks ads effectivelyApp Store reviews ›
Listed at $19.99 once on the App StoreApp Store listing ›
Where we recommend it
Apps nobody maintains any more ›Paid apps still on sale years after their last update.
Alternatives with the same rule.
Every app here is still for sale, still well reviewed, and has gone at least three years without an update. That is not automatically bad — some software is simply finished — but you should know before you pay. Also with a catch.
$3.99 once · 4.7★ (3,000) · Updated Feb 14, 2021
Verdict. A no-frills white noise app with a wide sound library and simple controls, praised for smooth looping and easy customization. A small number of reviewers report crashes or trouble opening it, which is worth noting given how few complaints exist overall.
Best for. Someone who wants to mix and layer ambient sounds for sleep without dealing with a subscription or a cluttered interface.
Dealbreaker. A handful of users report the app crashing or failing to open, so it's not flawless on stability.
$2.99 once · 4.7★ (1,968) · Updated Jan 26, 2021
Verdict. Reviewers praise the sound quality and simple interface, and a few note it's easy on battery life overnight. The review set is thin beyond that, so it's hard to say much about edge cases or long-term reliability.
Best for. Someone who wants a straightforward, no-frills sleep sounds app with a clean set of nature recordings and doesn't need alarm features.
Dealbreaker. At least one reviewer wanted to use these sounds as a morning alarm and couldn't, so this isn't built for that use case.
$4.99 once · 4.6★ (574) · Updated Nov 17, 2015
Verdict. Star Chart Infinite gets consistent praise for its realistic night-sky visuals and simple interface, and reviewers repeatedly call it worth the money. It hasn't been updated in a long time, and some reviewers on newer iPhones report crashes and stuck screens.
Best for. Someone with an older iPad who wants a visually striking constellation map for casual stargazing without worrying about future subscription charges.
Dealbreaker. The app hasn't been updated in years, and a few reviewers on newer iPhones (like the iPhone 14) report it crashing or getting stuck.