+ Limitation of Tabula rasa
This app is a trial version of Bucephalas (full version). Its episodic memory is initialized on startup, but you can still use most of the features of the full version.

+ Features as a Cycle Computer App
　Bucephalas (Tabula rasa) is designed with the assumption that a user's primary means of transortation is a bicycle. Therefore, this app has the basic features of a cycle computer app.
• A quasi-real-time slope meter using a barometer.
• Automatic recording of local minima of slopes.
• Elevation gain, maximum elevation gain, cumulative elevation gain by using a GPS altimeter or a barometer.
• Estimate heading twithout using the magnetic compass whenever possible.
• Voice navigation to a destination.
• Indicates the direction of a destination by using 3D sounds (stereo sounds).
• Adaptive control of GPS activity based on the battery level (full-blast mode, high-accuracy mode, power-saving mode, starvation mode, and nirvana mode).
• Effective speed; an original speed statistic based on a medial speed instead of average speed.
• Location bookmark.
• Real-time speedometer.
• Maximum speed indicator.
• Distance traveled since the start of the app.
• Odometer.
• Altimeter and barometer.
• Automatic recording track recording.

+ Purpose of Unknotting
Imagine that someone has drawn a large number of latitudinal and longitudinal lines on the earth. These lines are separated by 1/60 degrees, or 1 minute. The intersections of these lines are called KNOTs.
Your mission is to unknot as many knots as possible.

+ How do you unknot a Knot?
You can unknot a knot by simply approaching within a radius of 50 m of a knot.

+ Gordian Knots
Most knots have fractions in their coordinates. For example, the latitude and longitude of the knot close to Apple Inc. are (+37.33333, -122.03333). However, the coordinates of some knots do not have fractions. Such knots are called Gordian Knots. The Gordian Knot closest to Apple Inc. lies at (+37.00000, -122.00000). Gordian Knots are unknotted in the same manner as ordinary knots.

+ Play Carefully
How many knots can you unknot? However, it should be noted that approaching some knots could be dangerous. So, play this game carefully at your own risk.

+ IMPORTANT
This App uses GPS in the background. Continued use of GPS running in the background can dramatically decrease battery life.

+Health Management
This App estimates the magnitude of your physical activity and shows it as METs•Hour (a product of Metabolic Equivalents of tasks and activity duration in hour). The estimated physical activity magnitude can be converted into calories burned. In doing so, this app needs your body mass data and has to communicate with Health App to obtain the data.
Also, this app can export the physical activity recorded in this app to Health app.