During the last decades, the stages of transport, preparation and manipulation of low-energy (up to 60 keV) radioactive ion beams (LERIB) have become crucial in nuclear physics. The current and future radioactive ion beam facilities have already applied the new requirements to provide high quality low-energy beams (low emittance, low energy spread, purified samples). This first step is required to maintain high transmission efficiency from the production up to the last detector involved in the measurement of the observable of interest. In addition of reliable diagnostics as for example beam profilers and emittancemeters, preparation devices are required for LERIB. One of them is the radiofrequency cooler and buncher (RFQCB) which can reduce the emittance of the beam and bunched it. This process is crucial to manipulate radioactive ions with lasers or ion traps. This stage opens the possibility of high precision measurements for nuclear physics: mass measurements and collinear laser spectroscopy. An overview of the current development of this topic at ALTO-LEB through the MLLTRAP project (double Penning trap mass spectrometer) will be presented.