# LostFound vs PID Controller Simulation

The clearest difference is rating: LostFound at 3.3 against PID Controller Simulation's 3.0. LostFound also leads on review sentiment (53% vs 33%) and price ($0.99 vs $3.99). PID Controller Simulation's advantage is update cadence (every 3 months vs every 12 months) and iOS requirement (13.0 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

LostFound costs $0.99 and PID Controller Simulation $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LostFound holds the better App Store score, 3.3 against 3.0. That said, the two scores are not equally well evidenced: LostFound has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 53% of LostFound's written reviews are positive against 33% of PID Controller Simulation's.

LostFound ships an update every 12 months, PID Controller Simulation every 3 months. The most recent releases landed on September 30, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | LostFound | PID Controller Simulation |
| --- | --- | --- |
| Price | **$0.99** | $3.99 |
| Rating | **[3.3 (13 ratings)](https://appshunter.io/ios/app/lostfound-lock-screen-banner/id531538181/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/pid-controller-simulation/id6612009107/reviews) |
| Number of ratings | **13** | 2 |
| Positive reviews | **52.6% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 months** |
| Monetization | **Free** | Paid |
| Size | 1 MB | 6 MB |
| Requires iOS | 26.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Doubleforte](https://appshunter.io/developer/518797799) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### LostFound

[App page](https://appshunter.io/ios/app/lostfound-lock-screen-banner/id531538181)

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

**In-app purchases:** none


### PID Controller Simulation

[App page](https://appshunter.io/ios/app/pid-controller-simulation/id6612009107)

Master PID control theory and practice with this comprehensive simulation platform. Learn fundamental concepts, tune parameters, and simulate real-world applications like temperature and motor speed control. Export PID parameters as production-ready code in multiple languages.

**Highlights:** Comprehensive tutorial system, Interactive scenario simulations, Performance analysis tools, Code generator for multiple languages, Real-time curve visualization, Advanced PID algorithm explanations

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

**In-app purchases:** none


## Frequently asked questions

### Is LostFound free?

LostFound costs $0.99, with no in-app purchases.

### Is PID Controller Simulation free?

PID Controller Simulation costs $3.99, with no in-app purchases.

### Which has better reviews, LostFound or PID Controller Simulation?

LostFound is rated higher. LostFound averages 3.3 out of 5 from 13 ratings, while PID Controller Simulation averages 3.0 from 2 ratings.

### Do LostFound or PID Controller Simulation have ads?

Neither LostFound nor PID Controller Simulation shows ads.

### Which is updated more often, LostFound or PID Controller Simulation?

LostFound ships an update every 12 months, and PID Controller Simulation every 3 months. Most recently, LostFound was updated on September 30, 2026 and PID Controller Simulation on September 23, 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.*