SimRa vs lostanzen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SimRa
This app anonymously collects data on near-crashes and bicycle traffic routes to identify hazardous areas and improve cyclist safety. It uses GPS and acceleration sensors to track trips and categorize potential dangers, with users annotating data post-ride.
- Anonymous data collection
- GPS route tracking
- Near-crash detection
- User data annotation
- Hazard identification
- Traffic flow optimization
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Comparable to other major cities worldwide, Berlin aims to reduce traffic emissions. Foremost mechanism for this is to increase the share of bicycle traffic. However, polls show that a lack of safety and fear of accidents keeps people from using their bikes more frequently. Furthermore, it also quite hard from a city planning perspective to get a good overview of location, time, frequency, and kind of hazards in bicycle traffic since official accident statistics only cover crashes but do not provide information on near crashes. In this project, we collect – with a strong focus on data protection and privacy – data on such near crashes to identify when and where bicyclists are especially at risk. We also aim to identify the main routes of bicycle traffic in Berlin. To obtain such data, we have developed the SimRa app that uses GPS information to track routes of bicyclists and the built-in acceleration sensors to pre-categorize near crashes. After their trip, users are asked to annotate and upload the collected data in a fully anonymous way. The collected data offers detailed insights into bicycle traffic in Berlin (and other cities) and hazardous situations to public administrators and other interested entities so that the number of near crashes (and hence also crashes) can be reduced. The data can also be used to optimize traffic flows to make bicycle traffic more attractive. For the evaluation of data, we plan to cooperate with interdisciplinary partners such as city planning, interested citizens, but also the Berlin Senate Department for the Environment, Transport and Climate Protection.
lostanzen
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Laden Sie unsere App lostanzen herunter. Damit Sie Ihr Lieblingsstudio immer in Ihrer Tasche haben! Mit unserer App können Sie Ihre Kurse planen, Stundenpläne einsehen, sich anmelden, und vieles mehr! Maximieren Sie Ihre Zeit und verpassen Sie nie die neuesten Informationen, die Sie immer zur Hand haben. Warten Sie nicht länger und laden Sie lostanzen jetzt herunter.
Screenshots
Verdict
The clearest difference is update cadence: SimRa at every 2 months against lostanzen's every 6 months. SimRa also leads on iOS requirement (12.0 vs 16.4). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SimRa ships an update every 2 months, lostanzen every 6 months. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.
| Parameter | SimRa | lostanzen |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 45.5% of reviews | — |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 10 MB | 84 MB |
| Age rating | 4+ | 17+ |
| Developer | David Bermbach | lostanzen |
In-app purchases
SimRa
No in-app purchases
lostanzen
No in-app purchases









