Comparison

LostFound vs Shift Unit

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

LostFound

Create a lock screen image with your emergency contact details. This banner can be displayed if your phone is lost or if you are injured, providing crucial information to anyone who finds it.

Highlights
  • Create emergency contact banner
  • Set as lock screen wallpaper
  • Choose background image
  • Input emergency contact details
  • Save and set image
Currently charting
Read full description

LostFound helps you create an image containing emergency contact information (in case you leave your phone at a restaurant or taxi cab, lose your phone, become injured, etc). Use this image as your lock screen's wallpaper. 1. Choose an image 2. Set your emergency contact info 3. Save the image and set it as your lock screen's wallpaper

About

Shift Unit

This utility app offers precise unit and currency conversions with over 1400 units across 34 categories. It supports light/dark modes, home widgets, and an independent Apple Watch app. Features include a custom keypad with calculator mode and educational Wikipedia integration.

Highlights
  • 1400+ conversion units
  • 34 categories
  • Light/dark mode support
  • Home widget
  • Apple Watch app
  • Custom keypad with calculator
  • Wikipedia integration
Features
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Shift Unit is a unit converter designed with usability and numerical precision in mind. It features 1437+ conversion units across 34 categories. It works great in light or dark mode, and as a Home Widget w/ localized number displays. Independent WatchOS app and complications. Operations can be carried out in portrait mode in simple precision (7 significant digits,) or in landscape mode in double precision (14 significant digits.) Conversion formulae use exact definitions of related entities--not approximations. Wikipedia page information can be pulled for categories and conversion units. (Look for info circle.) The custom keypad has a calculator mode, and allows to enter/edit numbers on either side of the conversion. Unit categories include Acceleration, Angle, Area, Bit Rate, Clock, Online Currencies, Data Storage, Area Density, Volumetric Density, Electric Charge, Electric Current, Energy, Volumetric Flow Rate, Force, Frequency, Fuel, Length, Luminance, Lux, Mass Flow Rate, Momentum, Power, Pressure, Radiation Dose, Radioactivity, Radiation Exposure, Speed, Temperature, Temperature Delta, Time, Torque, Typography, Volume, and Weight. Features: - One screen operation minimizing number of gestures - Numbers (digits, decimal/grouping separators, exponent)/time/country names localized to your (or any) region - Current time in 2 out of 439 world cities and see your cities pinned on a flyover map, an educational way of discovering the world through time zones - Weather conditions and forecast for time zone cities - Dedicated accessibility labels and hints for VoiceOver operations - Customizable number entry timeout allowing to enter a new number without having to clear the field. (Turned off when an accessibility feature, e.g. VoiceOver, is on) - Customizable user interface (preferred categories; user interface alignment for left/right-handed entry or 2-thumb operations) - Ability to swap units while keeping initial numerical entry - Category presets for quick change of context, including user preset - Long-press category button to remove, or add a category on the fly - Long-press number field for copy/paste - Paste Mathematical constants (Pi, e, etc.) - Education via Wikipedia pages for categories and conversion units - Currency conversions using online rates - Searchable list of currency rates with possibility to change base rate - Set favorite currencies - Built-in numeric keypad (with calculator mode) to enter numbers on either side of the conversion - Long-press delete key to clear the field in focus - Engineering number format handling - Infinity and negative numbers handling - 7 or 14-digit precision displays (3-digit fractions for currencies) - Searchable list of 1400+ conversion units across 34 categories - On-boarding screens for general operations and for the Currency category (turned off when VoiceOver is on) - Home widget for quick conversions using units selected in the hosting app Happy Conversions!

Screenshots

LostFound3 screens
Shift Unit4 screens

Verdict

The call

The clearest difference is review sentiment: Shift Unit at 100% against LostFound's 53%. Shift Unit also leads on price (Free vs $0.99) and rating (5.0 vs 3.3). LostFound's advantage is chart position (#181 vs unranked). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Shift Unit is free to download; LostFound costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Shift Unit holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 13 and 21 respectively. Written reviews point the same way: 53% of LostFound's written reviews are positive against 100% of Shift Unit's.

UpkeepUpdate frequency

LostFound ships an update every 12 months, Shift Unit every 2 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 6 level
LostFound versus Shift Unit: the parameters behind the verdict, then further details
ParameterLostFoundShift Unit
Price$0.99Free — better
Rating3.3 (13 ratings)5.0 (21 ratings) — better
Positive reviews52.6% of reviews100.0% of reviews — better
Number of ratings1321 — better
Update frequencyEvery 12 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#181 — better—
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS26.226.0 — better
Further details — not scored
Size1 MB18 MB
Age rating4+4+
DeveloperDoubleforteDidier Burton

Customer experience

LostFound

All ratings13 ratings
Positive38.5%
Neutral23.1%
Negative38.5%
Written reviews38 reviews
Positive52.6%
Neutral21.1%
Negative26.3%

Shift Unit

All ratings21 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

LostFound

No in-app purchases

None

Shift Unit

No in-app purchases

Questions

Is LostFound free?
LostFound costs $0.99, with no in-app purchases.
Is Shift Unit free?
Shift Unit is free to download, with no in-app purchases.
Which has better reviews, LostFound or Shift Unit?
Shift Unit is rated higher. LostFound averages 3.3 out of 5 from 13 ratings, while Shift Unit averages 5.0 from 21 ratings.
Do LostFound or Shift Unit have ads?
Neither LostFound nor Shift Unit shows ads.
Which is updated more often, LostFound or Shift Unit?
LostFound ships an update every 12 months, and Shift Unit every 2 months. Most recently, LostFound was updated on October 23, 2026 and Shift Unit on October 25, 2026.

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